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cover of episode The Edinburgh Body Snatchers: Murder at Halloween

The Edinburgh Body Snatchers: Murder at Halloween

2024/10/25
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Cautionary Tales with Tim Harford

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Tim Harford: 我讲述了1828年发生在苏格兰爱丁堡的威廉·伯克和威廉·黑尔谋杀案。他们为了满足医学院对尸体的需求,而系统性地谋杀了多名无家可归或社会边缘人士。这个故事探讨了市场机制的运作,以及社会对某些交易的伦理反感。伯克和黑尔的故事揭示了当法律和道德规范无法有效约束市场需求时,可能会导致怎样的悲剧。 我分析了当时的法律环境,解释了为什么伯克和黑尔最初的尸体买卖行为并不违法,以及这如何导致了他们犯罪行为的升级。我还探讨了人们对器官买卖等“令人反感的市场”的伦理抵触,以及如何通过设计更合理的机制来解决类似问题。 最后,我总结了伯克和黑尔案件对社会的影响,以及此后爱丁堡为解决尸体短缺问题所采取的措施。这个故事提醒我们,在追求经济利益的同时,必须始终关注伦理道德,并建立完善的法律法规来规范市场行为,避免类似悲剧的再次发生。 William Burke: 我和我的同伙威廉·黑尔为了赚钱,向医学院出售尸体。起初我们只是处理无人认领的尸体,但后来为了获得更多利润,我们开始谋杀那些看起来不会被发现失踪的人。我知道我们的行为是错误的,但我被金钱蒙蔽了双眼。我为我的罪行感到后悔,但为时已晚。 William Hare: 我最初只是为了解决我旅馆里死者的尸体问题,才和伯克一起开始贩卖尸体。我并没有直接参与谋杀,但我对伯克的犯罪行为知情,并且从中获利。为了避免被判刑,我选择向警方坦白,并指证了伯克的罪行。 Robert Knox: 我是一名医生,我的医学院需要大量的尸体来进行教学。我知道伯克和黑尔从哪里获得尸体,但我并没有过问他们的来源。我承认我的行为是不道德的,但我认为我的教学工作更重要。 Magidohity: 我是一个来自爱尔兰的可怜女人,在爱丁堡寻找我的儿子。我遇到了伯克,他邀请我到他家过夜,结果我被他们谋杀了。 Daft Jamie: 我是一个在爱丁堡街头流浪的智障少年,我被伯克和黑尔谋杀了。 Alvin Roth: 我是一位经济学家,我研究了“令人反感的市场”,例如肾脏买卖。这些市场之所以被禁止,是因为人们对这些交易的伦理反感。我们需要找到一种方法,在满足社会需求的同时,避免触及道德底线。

Deep Dive

Key Insights

Why did William Burke and William Hare start selling bodies to medical schools in Edinburgh?

In 1827, Edinburgh was a world center for anatomical study, but there was a severe shortage of cadavers for medical students. Burke and Hare saw a business opportunity after one of Hare's lodgers died, and they discovered they could sell the body to Dr. Knox's medical school for £7.10, equivalent to three months of hard manual labor.

What legal loophole allowed Burke and Hare to sell bodies without breaking the law?

Under Scottish law, a dead person's possessions passed to their next of kin, but the body itself was not considered property and could not be owned or stolen. This meant Burke and Hare could legally sell bodies to medical schools as long as they removed any clothing, which was considered property.

How did the Anatomy Act of 1828 change the supply of cadavers for medical schools?

The Anatomy Act allowed medical schools to claim unclaimed bodies from workhouses, prisons, or hospitals within 48 hours of death. This reduced the need for grave robbing and eliminated the incentive for murder, as seen in the Burke and Hare case.

What was Dr. Knox's role in the Burke and Hare murders?

Dr. Knox, a prominent anatomist, purchased bodies from Burke and Hare without asking questions about their origins. His demand for cadavers to teach his students created a market that incentivized the murders. Despite public outrage, Knox continued his lectures and faced no legal consequences.

Why did the public find the idea of a legal market for cadavers repugnant?

The public objected to the idea of a legal market for cadavers because it exploited the poor, whose bodies were often taken from workhouses. Campaigners argued that it was unjust to use the bodies of the poor to train doctors who primarily served the wealthy.

What was the significance of the 'not proven' verdict in Scottish law during Burke's trial?

Scottish law includes a 'not proven' verdict, which means the jury believes the accused is likely guilty but lacks sufficient evidence for a conviction. This verdict allowed Burke's wife to avoid punishment, while Burke was found guilty and sentenced to hang.

How did Alvin Roth's concept of 'repugnant markets' apply to the Burke and Hare case?

Alvin Roth's concept of 'repugnant markets' refers to markets society bans due to moral objections, such as selling kidneys or cadavers. In the Burke and Hare case, the lack of a legal market for cadavers created a black market that incentivized murder, highlighting the societal costs of banning such markets.

What was the public reaction to Dr. Knox's involvement in the Burke and Hare murders?

The public was outraged by Dr. Knox's role in the murders, as he failed to question the origins of the bodies he purchased. Protesters gathered outside his home and lecture hall, and his effigy was hung from a tree. Despite this, Knox remained unrepentant and continued his work.

What happened to William Hare after he turned King's evidence?

William Hare avoided prosecution by testifying against Burke, confessing to 16 murders. He and his wife were chased out of Edinburgh by angry mobs and disappeared from public records, escaping legal punishment.

How did the Burke and Hare case influence the medical profession's use of cadavers?

The Burke and Hare case led to the Anatomy Act of 1828, which regulated the supply of cadavers to medical schools. This act shifted the focus from using executed criminals' bodies to unclaimed bodies from institutions, reducing the need for illegal activities like grave robbing and murder.

Chapters
Introduction of a new cautionary club with additional member-only content and a listener survey. Podcast outro with credits and thanks.
  • Announcement of a cautionary club.
  • Listener survey invitation.
  • Podcast credits and outro.

Shownotes Transcript

Translations:
中文

Pushkin.

Hello dear listeners, it is Tim Harford here with an exciting idea up my sleeve. I want to know if you'd be interested in joining a cautionary club with additional member-only content. And with that in mind, the Cautionary Tales team and I have put together a survey. We'd like to find out exactly what kind of content you're keen to get your hands on. Would you like a cautionary newsletter? Perhaps some extra conversations like my last one with Adam Grant?

Or maybe you have another idea for us altogether. The link is in the episode description and it will take you just a few short minutes to answer. So please do take a moment to fill it out and let us know your thoughts. We are really keen to hear from you. Thank you.

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Hello, I have a frighteningly good episode of Cautionary Tales for you this Halloween. It was recorded in front of a live audience at the podcast show in London, and I shared the stage with actors and our sound supremo Pascal Wise, who not only created grisly sound effects by hand, but played the trombone too. I hope you enjoy this nightmarish marriage of true crime and economics.

October the 31st, Halloween, in Edinburgh, Scotland, 1828. A short, middle-aged woman walks into a bar where a man sits drinking. She asks the barkeeper... Can you help me? I've come to Edinburgh to see my son, he's working here. But when I went to the last address he gave me, the landlady said he left three days ago. I don't know where he is and he doesn't know I'm here. I've no money and no place to stay.

The man who's drinking at the bar looks up. Wait a minute, you're from Ireland. I can tell by your accent. Yes, I'm from Donegal. My name's Madgie Doherty. No way, I'm a Doherty too. And our family in Donegal, sure we must be related. Let me buy you a wee drink. What an amazing coincidence. Now, Madgie, you must stay the night with me and my wife.

The man takes Magidohity back to a room in a shared house, 16 feet by 7. In the room is a wooden bed with straw for a mattress and a pile of straw to the side. He gives her a drink and some food and another drink. Then he says... Right enough. I need to pop out now. I'll be back.

Magi Doherty goes in search of someone to talk to. She pokes her head around the door of the neighbouring room, introduces herself to the woman there and tells her sad story. You know, I really should be looking for my son. I'll go out searching now. Leave it till tomorrow, says the neighbour. Halloween's a busy night. You don't know the city and you've obviously had a lot to drink. You may not easily find your way back here. You're right. I'll just wait till Mr Doherty gets in.

"Mr. Doherty," says the neighbour. "Mr. Doherty, my relative. Your neighbour, he lives in that room there." "He's not called Doherty," says the neighbour. "He's called Burke." The two women look at each other, confused. Does Madgie start to sense that something is wrong? Perhaps not. She is very drunk. Mr. Doherty, or rather Mr. Burke, comes back. He's with a friend and both their wives.

The four of them take Magidotti back to Burke's room. Then they shove Magidotti down to the bed. Burke pins her down while the other man clamps his hands over her nose and mouth. She can't move. She can't call for help. She can't breathe. I'm Tim Harford, and you're listening to Cautionary Tales live in London. APPLAUSE

November 1827, a year before Magidotti's fateful Halloween, William Hare has a problem. Hare runs a cramped and cruddy boarding house in a slum part of Edinburgh's old town, where the buildings are packed tightly together and the smells from the nearby tanneries compete with those from sewage hurled from windows into the street. APPLAUSE

One of Hare's lodgers has just died, and the dead man seems to have no relatives or friends to take the body away. Hare tells the local authority, and they say, we'll get it and bury it in a pauper's grave. But a full day passes and nobody comes. That body's taking up space. I could be renting out. Hare complains to his friend, William Burke.

Burke and Hare have both heard rumours that it's possible to sell human bodies to medical schools. Could they sell Hare's dead lodger? Neither has any idea how to go about it. So they make their way to another, more prosperous part of Edinburgh, where the medical schools have their quarters. They ask around, but nervously. They assume that what they're doing must be against the law. Are you a student?

We've heard that medical schools are sometimes in need of, er, human bodies. You'll want to see Dr. Knox. Number 10, Surgeon Square. Burke and Hare make their way to Surgeon Square and find Number 10. One of the doctor's assistants opens the door. The doctor's not here now. Ah, you have a subject. Bring it after dark.

Back at Hare's boarding house, someone from the local authority has been round with a coffin and put the body in it. Soon a porter will come to take the coffin away. Burke and Hare have no time to lose if they want to get some cash for their dead lodger. They gently pry up the nails on the coffin lid, haul the body out and stuff it in a sack. And when the porter comes, he's bound to notice if the coffin's empty. They'd better put something heavy in it.

They go to a nearby tannery where piles of bark are crushed for the tannin used to make leather hides. Burke and Hare take a load of the bark, they tip it into the coffin, nail down the lid again. Then they wait for dark to fall. The two friends heave the sack with the lodger's body through the streets of Edinburgh, back to the doctor's place. Come on in then. You're new, I take it. Well, up the stairs and lay the subject out on that table there for the doctor.

Oh, and you'll have to take the nightshirt off it. Burke and Hare take the nightshirt off the body. Into the room comes Dr Knox, a striking figure in his mid-thirties, prematurely bald with just one eye. Smallpox took the other, and always flamboyantly dressed with his gold chains and embroidered waistcoat, Dr Knox glances at the naked body, nods his head, and says...

Let's say £7.10. £7.10? That's about what you'd earn for three months of hard manual labour. Burke and Hare can hardly believe their luck. The assistant gives them the money and escorts them back to the door. Is nobody going to ask them where they got the body? Or who it was? Or what gives them the right to sell it? Apparently not. Can it really be that easy?

Apparently so. We'll be glad to see you again when you have another body to dispose of. Burke and Hare had assumed that what they were doing must be illegal. It was not. The law said a dead person's possessions pass on to the next of kin. That's why Dr. Knox's assistant insisted on the nightshirt being taken off the body. Legally, that nightshirt must belong to someone, even if it wasn't clear who.

Dr. Knox could get in trouble if he bought it. But the body itself was a different matter. When a person died, their next of kin didn't own the body. In the eyes of the law, a human body was not a thing that could be owned at all. And if it couldn't be owned, then, logically speaking, it couldn't be stolen. Burke and Hare had broken no law by taking the lodger's body.

Dr. Knox had broken no law in buying it. Lecturers like Dr. Knox needed bodies to teach their students. For years, the law had given medical schools the bodies of criminals who'd been hanged. Indeed, knowing you'd be publicly dissected was seen as part of the punishment. But more and more people were training as doctors, and nowhere near enough criminals were being sentenced to death.

By the 1820s, a black market had sprung up to meet the demand for bodies. Some, like Hare's Lodger, were taken straight from their deathbeds to the medical school. But most were supplied by grave robbers or resurrectionists. They'd sneak into graveyards in the dead of night and dig up a recently buried corpse. As nobody owned those bodies, it wasn't stealing, as long as they took the clothes off the body and put them back in the coffin.

There was one law the resurrectionists were breaking. It was illegal to violate a sepulchre. But the punishments weren't severe and prosecutions were rare. The authorities mostly looked the other way. No one wanted to put the medical schools out of business. Still, perhaps there was a better way. Some people floated ideas to create a legal supply of cadavers, as the author Lisa Rosner describes in her book on Birkenhair.

One proposal was to let universities have the bodies of people who died in poorhouses. These people had relied on handouts from the public purse, the argument went. Surely we could dissect them when they died, instead of spending yet more on a pauper's burial. Great idea, said the radical politician Henry Hunt. How about we start with the people who've benefited most from public money during their lives?

Now, I would recommend... No, listen, listen. I would recommend in the first place that the bodies of all our kings be dissected instead of expending seven or eight... 700,000 pounds of the public money for their internment. Next, I would dissect legislators. Hunt's objections struck a chord with the public.

Poor people couldn't afford to get treated by doctors, so why should their bodies be the ones doctors trained on? But what were the alternatives? Another more imaginative proposal came from the Royal College of Physicians of Edinburgh. Create a fully legalised, regulated market. Let living people sell to medical schools the right to use their body after they die.

It wouldn't be wise, they added, for such a market to let relatives sell bodies after death. That might create a legally sanctioned incentive for murder. But of course, there already was a legally murky market, and the incentive for murder that it created was all too clear.

A few weeks have passed since Burke and Hare received their seven pounds and ten shillings, and they sense the possibility of another payday, because another of William Hare's lodgers has fallen gravely ill. An old man with no known relatives. He's delirious with fever, too weak to speak. He is going to die, isn't he? Hopefully soon. What's taking him so long?

Is there any way he might be encouraged to hurry up? Burke presses a pillow onto the man's face while hair pins him down to stop him struggling. It doesn't take long. Cautionary Tales will be back after the break.

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Welcome, gentlemen. Take your seats.

Today, we will consider the causes and treatment of lateral curvature of the human spine. Dr. Robert Knox ran the most popular medical school in Edinburgh. In the winter of 1827, he had 247 students, almost twice as many as his nearest competitor. That's partly because Knox was such a brilliant teacher.

As one writer put it: "In Giff's speech, he was unequalled. His harmonious voice, his clearness, his logical precision, the enormous amount of information which flowed without effort from his lips." Knox was also snooty, even cruel, when he described his rivals. He mocked them when they didn't have enough cadavers to teach with and had to use illustrations instead.

Gentlemen, would you pay to study at their school of pictorial anatomy? That's the other reason Knox's school was so successful. He ensured his students had a steady supply of corpses. Knox would assign six students to each body. They'd rotate around, taking turns to practice with a scalpel, forceps or saw.

peeling back the skin and fat, to examine the muscles and ligaments on the limbs, cutting through the ribs to explore the lungs and the heart, trying out specific surgeries such as extracting bladder stones. As another eminent surgeon put it, "It is only when we have acquired dexterity on the dead subject that we can be justified in interfering with the living."

Students knew they could rely on Dr Knox to give them that chance to acquire dexterity. And grave robbers knew that when they brought a body to Knox, he wouldn't haggle too hard or fob you off with a credit note. He'd give you a fair price and prompt payment in cash.

By April 1828, William Burke and William Hare were becoming regulars at Dr Knox's place on Surgeon's Square after the old man had brought the doctor an old woman and a middle-aged man who clearly had jaundice and could plausibly have died from that.

They knew the routine now. They'd bring the body naked in a tea chest. They'd follow the doctor's assistant up the stairs, lay the body out on the dissection table for the doctor to examine. But the latest body was quite unlike the others they'd brought so far. This naked corpse was that of a young girl, maybe 18 years old, young and beautiful.

The doctor's assistant took one look at her and... I know that girl. She's called Mary. She lives in Canongate. I saw her a couple of weeks ago and she looked in perfect health. The body was cool but not yet stiff. Clearly the girl had not been dead for more than a few hours. Where did you get that body?

Burke and Hare must have felt the panic rising in their chests. Up to now, they'd actually been pretty smart. They'd killed people who nobody would notice were missing, who were old or obviously diseased. But perhaps they'd been smart only by accident. Because now they'd got and murdered a healthy young woman whose face was known around town. Standing in front of the doctor and his assistant,

They must suddenly have realised how reckless that was. Burke tried to think on his feet. We bought it. We bought the body from an old woman on the cannon gate. Dr Knox looked at them. Perhaps he believed them. Perhaps he didn't. Either way. That's fine, gentlemen. Shall we say eight pounds? Eight pounds.

In the 1990s, the economist Alvin Roth became fascinated by kidneys. When a person has kidney failure, their life can sometimes be saved by a transplant. But that requires not only a donor, but a donor whose kidney matches in terms of blood type and tissue type. It's possible for a living person to donate a kidney. We have two, and most of the time, we can function just as well with only one.

Sometimes a family member will offer to donate a kidney to save their loved one's life. But often, frustratingly, the would-be donor isn't a match. Sometimes a patient will get lucky. A total stranger will make the offer, motivated by pure altruism. But there's one thing a patient can't do: pay someone to give them a kidney. Thinking as an economist, Roth wondered, why not? You have a sick, wealthy person who needs a kidney.

You have a poor, healthy person who's willing to lose a kidney for the right price. Two consenting adults who want to engage in a transaction that will benefit them both. Why should we stop them? And yet we do stop them. Selling kidneys is against the law in almost every country in the world. Roth is curious. What exactly is it we object to about a legally sanctioned market in kidneys?

Perhaps we're concerned that sellers wouldn't fully understand the risks, but could regulate the market to make sure consent was informed. Maybe we worry that people might be coerced into selling their kidney. But we already have safeguards to ensure that family members who come forward are not under duress.

Or maybe the concern is about where it could lead. Legalize kidney sales and before you know it, you might have mortgage lenders requiring your kidney as extra collateral. Again, says Roth, you could write laws to guard against that. But even if you imagine laws and regulations that are completely watertight, Roth found, people still don't want it to be legal for others to sell their kidneys, even if they can't articulate exactly why.

Roth realized he'd stumbled on an idea that didn't have a name in the economic literature. In 2007, he published a paper that gave it a name: "Repugnant Markets." These are markets we ban because we just don't like the idea of there being a market. It makes us go, "Yuck!" Roth pointed to other markets that people find repugnant. In many countries, sex is like donating a kidney. It's fine to do it for love.

but against the law to do it for money. Often though, when we ban a repugnant market, we force it underground. There's a global trade in kidneys. And banning prostitution doesn't tend to stop it happening. Societies must then decide how hard to actually try to stamp the market out. Sometimes the answer is not very hard at all. Paying for sex in many places is technically illegal, but tacitly tolerated.

The same could be said of that more literally underground activity, robbing graves for bodies in 1820s Edinburgh. Nobody wanted to mount a serious crackdown on violating sepulchres, but nor was there any appetite for setting up the kind of legalised market in cadavers suggested by the Royal College of Physicians. The thought was far too repugnant.

Faced with a hard choice, the authorities tried to ignore it. But Burke and Hare were about to make it impossible to look the other way. On the streets of Edinburgh's Old Town, one of the best-known characters was a teenage boy whom the locals called Daft Jamie. He spent his days wandering barefoot, singing, gabbling nonsense and telling jokes and riddles.

Sometimes other boys made fun of him and Jamie got tearful. But he'd never fight them because only bad boys fight. People liked daft Jamie. They gave him little gifts of money, food or clothes. One day, William Hare's wife came across Jamie looking for his mother. Come with me, she said. Back at the boarding house, she left Jamie with Hare and a bottle of whiskey and went to fetch Burke.

She ushered Burke into the room and locked the door. At Surgeon's Square, Dr Knox's assistant recognised the body at once. I know who that is. That's Duff Jamie. No, no, no. I'm sure you must be mistaken. It can't possibly be anyone you know. Still, let's prepare this one for the students quickly now, shall we?

By the time people started to notice that no one had seen Daft Jamie for a while, the evidence of the murder had been cut up into tiny pieces and disposed of. Burke and Hare had got away with it again. They must have thought they could get away with anything. Then, on Halloween in 1828, they made one mistake too many. Cautionary Tales will be back after the break.

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Like many young couples in Edinburgh's crowded old town, Anne and James Gray couldn't afford to rent a whole room, so they sublet space in a room from someone else, William Burke and his wife. The Grays and their infant son had been lodging with the Burkes for just a couple of weeks when, on Halloween, William Burke came home with a guest he'd met at a bar, Maggi Doherty.

Burke said to Anne, Right, I want you to stay here for the night. I need your bed for my wee relative here, Margie. Where are we supposed to go? Don't worry. My friend Hare's got a wee lodging house. You can sleep there tonight. Anne and James weren't happy, but they left. When they returned in the morning, there was no sign of Margie, and Burke seemed strangely flustered. Have a drink. Thank you.

Burke poured the glasses of whiskey and then he started pouring whiskey all over the pile of straw in the corner of the room. What are you doing that for? You'll make the whole room stink of whiskey. Oh, I just want to empty the whiskey bottle so that I can, you know, go out and get some more. Very odd. Was there perhaps some other smell Burke was anxious to disguise?

The Greys kept their clothes near that pile of straw. Anne crossed the room to get her infant son a clean pair of stockings. Get away from there! Burke's behaviour was getting stranger and stranger. For the rest of the day, either Burke or his wife sat close to the pile of straw, eyeing the Greys suspiciously. Anne later told the police. I thought there was something that was not right.

At last, just before darkfall, Anne got her chance to investigate. Burke had left the house to run some kind of errand. Then Burke's wife stepped out for a moment too. The first thing I got on lifting up the straw was the woman's right arm. Anne and her husband lifted more of the straw to reveal the head with blood around the mouth. They both recognized the woman they'd met briefly the night before, Maggi Doherty.

Anne and James Gray pack up their belongings, grab their infant son and make for the door. On their way out of the house, they meet Burke's wife coming back in. What the hell's going on? There's a corpse in the room! Burke's wife falls to her knees. Don't tell anyone, she begs. We'll give you money. God forbid. The Grays push past Burke's wife and go to a police station to tell their story. By the time a policeman arrives at Burke's room, the body's gone.

But there's blood on the straw. And the neighbours say they've just seen Burke and another man taking out a heavy-looking tea chest. If that was a body, thinks the policeman, where might they have taken it? The policeman knocks on the door at 10 Surgeons Square. Yes, indeed. I've just taken delivery of a cadaver in a tea chest. You'd like to see it, of course. Come on in.

As the economist Alvin Roth discovered, people find it easy to discuss the potential costs of legalising a market they find repugnant, such as a market in kidneys. It's harder to get them to think about the costs of keeping that market banned. But those costs are real. The people who'd be willing to sell a kidney have to do without the money they could have earned. Of course, we hate to think of people selling a kidney only because they're poor and desperate, but

Banning kidney sales doesn't make the poverty and desperation go away. Then there are the people who'd like to buy a kidney, but can't. They end up spending countless hours tied to a dialysis machine. If they're lucky, if they're unlucky, they end up dead. Still, that widespread feeling of repugnance isn't something you can just wish away. Roth asked himself...

Is there a way to create a mechanism that works like a market, so it gets more kidneys to more patients, but that doesn't trigger a repugnance response? Roth helped to design kidney exchanges. Imagine that you and I both need a kidney, and both our partners are willing to donate. My partner's kidney isn't a match for me, but it is for you. And your partner's kidney isn't a match for you, but it is for me.

So we swap donors. Roth's exchanges take this simple swap and make it work on a bigger scale. They can link dozens of donors in one chain. It's like a market for kidneys, but instead of paying with money, you pay with a willing donor. Nobody finds it repugnant. Roth won a Nobel Memorial Prize in economics for his work in designing new kinds of markets.

Perhaps if Alvin Roth had been around in 1820s Edinburgh, he could have found some equally clever way to get more cadavers to more medical schools. Something like the idea of the Royal College of Physicians to reward the living in exchange for their body after death. The absence of such a mechanism had costs. Just ask Magidohity.

William Burke insists to the policeman that he has no idea how Magi Doherty ended up dead. Sure, none at all. They were all drinking and singing and dancing, he says, with William Hare and both their wives, and then they suddenly noticed Magi wasn't there anymore. Sure, she must have crawled into the pile of straw and, you know, died. A likely story.

But could the public prosecutor prove beyond reasonable doubt that Burke and Hare and their wives were guilty of murder? Forensic science was less advanced than today. The doctors said the state of Maggi Doherty's corpse was consistent with her having been forcibly suffocated. They couldn't say for certain that she didn't choke to death on her own vomit.

In Scottish law, it was notoriously hard to get a jury to convict for murder. Other legal systems offer a jury just two possible verdicts: guilty or not guilty. Scottish law adds a third possibility. Not proven. It means we think you probably did it, but we're not quite sure enough to send you to the gallows.

The only way to guarantee at least one conviction, the prosecutor reluctantly decided, was to cut a deal with one of the accused. Testify and we'll let you off. William Hare jumped at the chance to turn King's evidence. Under Scottish law, a man couldn't testify against his wife, so Hare's wife was off the hook too.

With immunity from prosecution, Hare confessed to the murder of Magi Doherty and Daph Jamie and young Mary and that sick old man in the lodging house and the old woman and the jaundiced man and that old grandma and a 12-year-old grandchild and 16 murders in all. The police were astonished.

But in 15 of those cases, the evidence had long ago been dissected away. Only Magidokhti's body remained. And so it was for the murder of Magidokhti that Burke and his wife stood trial. Burke's wife, the jury found... Not proven. Burke, though... Guilty. The judge left no doubt about what he thought...

William Burke was sentenced to hang.

Burke and Hare's murders focused the minds of politicians. They had to remove the incentive for robbing graves and committing murder. They passed the Anatomy Act, which gave medical schools the right to take bodies from workhouses, prisons or hospitals if no one had claimed them within 48 hours of death.

Campaigning politicians continued to object. The law was commandeering the bodies of the poor, they said, to trade doctors whose services only the rich could afford. But was there a better alternative? If Alvin Roth had been around in the 1820s to think that question through, what might he have suggested? Roth gives us a clue in his paper, Repugnance as a Constraint on Markets.

He quotes an editorial from the Lancet in 1824, four years before the Edinburgh murders, which argued for ending the historical practice of giving medical schools the bodies of hanged murderers. It only keeps up the prejudice against dissection, they wrote. That would have been a good start in overcoming repugnance, says Roth.

Instead of seeing dissection as punishment, you try to reframe it as an altruistic contribution to advancing medical knowledge. Many people see it that way today when they leave their bodies to science. The present-day University of Edinburgh, for instance, assures potential donors that...

Were it not for such acts of selflessness, it would be impossible to maintain Scotland's high educational reputation in the medical professions. And for this we are extremely grateful. Back in 1828, William Burke was sentenced to hang and be dissected. No clever attempt at reframing there, thousands of people queued to see Burke's naked body on the dissection table.

In museums in Edinburgh, you can still see his skeleton and a pocketbook made from his skin. In the university's archives is a letter written in Burke's blood. But what about William Hare and the wives? People in Edinburgh were outraged they'd got off scot-free. All were chased out of town by angry mobs. A mob gathered two outside the home of Dr Knox. They hung his effigy from a tree.

Why hadn't he asked more questions about the bodies? He could have stopped the murders at an earlier stage. Knox was unrepentant. He carried on his lectures as usual, talking over the shouts of protesters outside his lecture room. "Ignore them," he told his students.

"The assailants of our peace may be big in menace, but they are too cowardly an act to confront such a phalanxed body of gentlemen as I see before me." Dr Knox eventually moved to London, where his notoriety posed less of a nuisance. When he died, aged 71, he left clear instructions about what should happen to his body.

Nox had always insisted on the importance of cadavers to train up doctors. So, did he make his own final, selfless contribution to advancing medical science? He did not. Lay me to rest in the churchyard, where the wildflowers bloom and the sun might shine on the green sod above my grave.

This live edition of Cautionary Tales was written by me, Tim Harford, with Andrew Wright. Tonight, you heard the voice talents of Ed Gohan and Stella Harford. Our sound designer, composer and live trombonist was Pascal Wise. Additional sound design from Tom Berry. Sarah Nix edited the script, thanks to Ryan Dilley. The show was produced by Alice Fiennes with Marilyn Ross.

Thanks to Avril Tucker, the teams at TEG Live Europe, The Podcast Show and Aztec. Portionary Tales is a production of Pushkin Industries. If you like the show, please remember to rate, share and review. If you want to hear the show ad-free, sign up on the show page of Apple Podcasts or at pushkin.fm slash plus.

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