In the Golden Age of crime fiction, many authors were tempted by the ‘perfect murder’. In Dorothy L. Sayers’ Unnatural Death, Lord Peter Wimsey ruefully states that the perfect murder would never be considered a murder, and would therefore necessarily go undetected. In 1936, six writers of the Detection Club each wrote a short story containing the ‘perfect crime’. Each story was then followed by an analysis of a retired CID inspector, who unpicked whether the crime would be detected in real life, or not. The inspector concludes that in each case, the police would eventually identify the killer – not surprisingly, he probably felt that to admit otherwise was to invite readers to have a go at replicating the ‘perfect murder’!
This is how it ends up in most interwar crime stories – no matter how ingenious the plot, usually the killer gets caught and either brought to justice, or given the option to take the ‘honourable way out’ and commit suicide. Not so, however, in Henry Wade’s Heir Presumptive. In this inverted murder story, the murder central to the book is judged to be an accident.
Henry Wade was one of the original members of the Detection Club. An ex-soldier, he turned to crime fiction writing after the Great War. Unlike most other crime writers of the period, he was genuinely part of the landed gentry – his real name was Henry Lancelot Aubrey-Fletcher. Wade used his insider knowledge of entailed estates to concoct the plot of Heir Presumptive, which features a family tree so intricate that a diagram is provided on the first page of the book (and to which this reader, for one, grateful referred back to multiple times).
The main character of the book is Eustace Hendel, a 35-year-old member of the secondary branch of descendants of the 1st Baron Barradys. The Baron’s title and estate are being passed down the male line and Eustace is far removed from them. He trained as a doctor, but after meeting ‘a rich widow’ who then ‘conveniently died’ (through natural means) Hendel came into an inheritance that allowed him to live as a man of independent means. At the opening of the book, these means have nearly run out, debts are racking up, and Hendel is on the look-out for a way to continue his lifestyle without having to work. He also has a relationship with Jill, an actress who makes it clear that she will not stick around if Eustace can’t afford her.
When Hendel reads in the paper that the son and grandson of the current Baron Barradys have both died in a mysterious swimming accident, he makes sure to attend the funeral, in the hope of mending relationships with his wealthy family. Hendel re-acquaints himself with his cousin David, who is now unexpectedly the next heir to the family name and estate. David’s only son is a 20-year-old invalid who is expected to die soon. However, David is young enough to remarry, and there is a general expectation that he will do so now that he is next in line for the inheritance.
It is at this point that Eustace formulates his plan. After David and his invalid son, he believes he himself is the next male heir. If he kills David and the son dies as expected, then he would become the next Baron, and inherit the sizable estate attached to that title. And even until the current Baron dies, being next in line to inherit would be sufficient to secure loans and favours.
It is clear at this point in the book, about six chapters in, that Eustace Hendel is not a sympathetic character. He is greedy, lazy, and openly contemplating murdering his next of kin for his own benefit. Wade surprises, then, by allowing Hendel to execute the perfect murder. David invites him up to his lodge in Scotland, to go deerstalking. On the final day of the trip, David and Eustace go off without assistance to a remote part of the estate. After Eustace shoots a stag, he asks if he can also be the one to cut its throat to allow it to bleed out quickly. Feigning a slip, Eustace instead plunges the knife into David’s femoral artery. After that, the remote spot and lack of onlookers make it easy for Eustace to ensure David bleeds to death before help can be found.
Although there is of course an investigation by the Scottish authorities, who are presented as more thorough and less obliging than their English counterparts, in the end, they decide not to pursue a criminal investigation. Although Wade allows Eustace to get away with the perfect murder from the perspective of a prosecution, he does not get the enjoy the expected benefits of his deed. The current Baron starts exploring options to cut Eustace out of the line of succession altogether, based on the general unfavourable impression he has of him.
In order to change the line of succession, the Baron needs the agreement of the current heir, David’s sick son Desmond. Eustace starts visiting Desmond and, under increasing pressure of Jill and various moneylenders, starts planning a second murder. Before he has time to execute it, however, Desmond dies. It is here that the reader starts to realise that Wade has been stringing them on all along. Although the focus has been almost exclusively on Eustace Hendel, it turns out he has been nothing but a pawn in someone else’s plan.
All along, the real mastermind has been David’s brother-in-law, lawyer Henry Carr. Henry orchestrated the swimming accident of the original heirs; Henry killed Desmond; and, after offering legal advice to Eustace, Henry frames Eustace for Desmond’s murder and then kills Eustace himself, making it look like a suicide. As if this isn’t enough, Eustace finds out just before he dies that whilst he is due to inherit the title of Baron, the estate and money are not passing through the male line and will instead be inherited by Henry’s wife (who is completely oblivious as to her husband’s murdering schemes).
For the final few pages of the book, after Eustace has died, the perspective switches to that of Henry Carr. We move from a world of country houses and independent incomes to suburbia – Carr travels by Underground to Waterloo as a seasoned commuter. ‘It was past the hour of the daily rush return from work, though the third-class carriages were fairly full; he himself never travelled first-class on ordinary occasions, but this was one on which he thought the luxury was justified.’ The motive for his murdering was to allow his wife to move out of the ‘semi-detached villa’ and to be able to afford the school fees for the children – middle-class aspirations if ever there were some.
In the end, then, it is not the lazy, good-for-nothing playboy who is the threat to the upper classes, but rather the ambitious professional man who stops at nothing to give his wife and children a better future. Heir Presumptive is a cynical book, perhaps reflecting Wade’s ‘pessimism about the state of Britain’. Eustace, Henry, even Jill – all are grasping for more than they have, without wanting to work for it. But whilst Eustace manages to orchestrate the perfect murder, he is too naïve to see the trap he walks into himself. Henry Carr, for all his cleverness, also has to reckon with justice – the final line of the book announces that ‘In the hall stood Chief-Inspector Darnell, accompanied by a uniformed police officer.’ Ultimately, Wade reassures the reader that no matter how clever the crime, justice will eventually be served.
 Published as Six Against the Yard (London: Selwyn & Blount, 1936). See Martin Edwards, The Golden Age of Murder (London: Collins Crime Club, 2016), pp. 285-6
 Edwards, The Golden Age of Murder, p. 194
 Henry Wade, Heir Presumptive (London: Remploy, 1980), p. 3
 Ibid., p. 77
 Ibid., p. 203
 Ibid. pp. 203-7
 Edwards, The Golden Age of Murder, p. 197
 Wade, Heir Presumptive, p. 209