Old Bailey

The Old Bailey, also called the Central Criminal Court, is the London setting for the murder trial of John Cavendish. The proceedings give institutional form to the case against him: evidence about Emily Agnes Inglethorp’s death and the household’s inheritance arrangements is presented to a jury, while the defence challenges whether the apparently conclusive clues identify the true culprit.

Trial and Charge

On September 15, John appears in the dock charged with the wilful murder of Emily Agnes Inglethorp and pleads not guilty. Sir Ernest Heavywether is engaged to defend him; Mr. Philips opens the case for the Crown. The prosecution portrays the killing as a deliberate poisoning by a stepson whom Emily had supported and treated generously, and links the accusation to financial pressure, an alleged quarrel, and the purchase of strychnine.

The case’s inheritance history supplies an important part of that argument. Emily’s August will of the previous year left her entire fortune to John, while the terms of his father’s will meant that Lawrence Cavendish would receive a substantial sum on Emily’s death. The prosecution also addresses the legal effect of Emily’s remarriage: the earlier will was automatically revoked, and evidence suggested that a later document had been drawn up in favour of her husband. John, who had practised at the Bar, was described by the defence as knowing that remarriage had revoked the earlier will.

Evidence and Its Limits

The trial follows an inquest at the Stylites Arms, where medical evidence established that Emily died of strychnine poisoning. The post-mortem indicated that she had taken at least three-quarters of a grain, and probably one grain or slightly more. This established the cause of death, but did not by itself identify who administered the poison.

The prosecution’s chemist’s assistant, Albert Mace, identified a phial as one he had sold to Mr. Inglethorp. Under questioning, however, he acknowledged that he knew Mr. Inglethorp only by sight and had never spoken to him. Alfred denied purchasing the poison and denied quarrelling with Emily; other witnesses supported those denials. The distinction between identifying a customer and knowing the customer personally becomes central to evaluating the force of the testimony.

A search of John’s room produced a pair of gold-rimmed pince-nez resembling Alfred’s and a small blue-glass phial labelled as strychnine hydrochloride. The prosecution also presented blotting-paper from Emily’s cheque book which, when reversed at a mirror, showed part of a sentence leaving her possessions to her beloved husband. Together with a charred paper fragment and evidence concerning a beard found in the attic, these discoveries appeared to support a detailed case against John. Their accumulation, however, did not settle how the objects came to be associated with him or whom they truly implicated.

Defence and Reversal

The defence contests the prosecution’s account of the quarrel and the purchase of poison. It argues that John had been told there was a quarrel between Emily and Alfred, and had no reason to think anyone might have mistaken his voice for Alfred’s. It also places John at Marston’s Spinney on July 16, where an anonymous blackmailing note had summoned him, rather than at the chemist’s shop. The note, the defence says, had been retained and would be produced as evidence.

Poirot’s assessment of the case sharpens the contrast between apparent certainty and proof. He regards the evidence against Alfred as too conclusive, arguing that genuine evidence is usually less neat and must be sifted. In his view, the criminal’s attempt to make the case against Alfred exceptionally complete has instead created a vulnerability that could free him. The trial’s competing interpretations thus turn not only on what each clue appears to show, but on whether the clues form a credible chain.

Significance as a Legal Setting

At the Old Bailey, suspicions that had developed in and around Styles Court become public claims tested through witnesses, exhibits, and adversarial argument. The venue’s importance lies in the difference between a compelling narrative of guilt and evidence capable of sustaining it: medical findings establish poisoning, while testimony and objects require scrutiny of their sources and reliability. The proceeding also makes the law of marriage and wills part of the mystery’s practical stakes, since Emily’s remarriage altered the effect of her earlier disposition and the disputed later will affected the proposed account of motive.