This was her opportunity. She would have said, had she been convicted, that he had driven her to it by his cruelties: that's as may be.—She consulted the family doctor who attended to the household of Bluebeard's Castle; suggested that Sir Grimthorpe (they had just knighted him) might be the better for a strychnine tonic; she had read somewhere that strychnine did wonders for middle-aged men who had led rather a rackety life in their early manhood.
The family doctor who disliked her and suspected her, as you or I wouldn't have done, but doctors think of everything, feigned to agree; and supplied her with little phials of aqua distillata flavoured with quinine. He himself was puzzled over Sir Grimthorpe's condition but was a little offended at not being personally consulted.
The fact was that Sir G. had a very poor opinion of his abilities in diagnosis and being naturally secretive and generally cussed, preferred consulting a London specialist. He wasn't then Sir Grimthorpe, the specialist wasn't very certain that it was cancer on the liver, and amid his multitude of consulters did not, unless aroused, remember very clearly the case of a Mr. Shillito from somewhere up in the North.
But Shillito pondered gravely over the specialist's carefully guarded phrases about "growths, possibly malign, but at the same time—difficult to be sure quite so soon—perhaps harmless, might of course be merely severe suppressed jaundice." When the pains began—he hated the idea of operations, and knew that any operation on the liver only at best staved off the dread, inevitable end for a year or a few months—When the pains began, he had grown utterly tired of life; so he compounded a subtle poison—he was a great chemist and had—only his wife knew not of this—a cabinet which contained a variety of mineral, vegetable, and acid poisons; and kept the draught in a secret locker in his bedroom. Meantime Arbella, who after all was human, was tortured at the sight of his tortures. She felt she must end it, or her nerves would give way. She trebled, she quintupled the dose of aqua distillata embittered with quinine. One night when the night nurse was sleeping ("resting her eyes," she called it) the wretched man stole from his bed to the night nursery and kissed both his boys. He then swiftly took the phial from its hiding place and drank the contents and died in one ghastly minute.
When the night nurse awoke he was crisped in a horrible rigor. On the night table was the phial with the remains of the draught. She had noticed in the last day or two Lady Shillito fussing a good deal about the sick man, pressing on him doses of a colourless medicine. What if she had stolen in while the nurse was asleep and placed a finally fatal draught by the bedside? From that she proceeded to argue (when she had leisure to think it out) that she hadn't been to sleep, had merely been resting her eyes. And she was now sure that whilst she had closed those orbs she had heard—as indeed she had, only it was Sir Grimthorpe himself—some one stealing into the room.
She communicated her suspicions to the doctor. The latter knew his patient had not died of anything he had prescribed, but concluded that Lady Shillito, wishing to be through with the business, had prepared a fulminating dose obtained elsewhere; and insisted on autopsy with a colleague, to whom he more than hinted his suspicions. Together they found the strychnine they were looking for—not very much, but the proportion that was combined by Shillito with less traceable drugs to make the death process more rapid—and quite overlooked the signs of cancer in the liver.
The outcome was that Lady Shillito at the inquest found herself "in a very unpleasant position" and was placed under arrest, and later charged with the murder of her husband.
Believing herself guilty she summoned all her resolution to her aid, admitted nothing, appealed to Michael Rossiter and others for advice. Thus David was drawn into the business.
[But this doesn't sound very credible, you will say. "If the husband felt he could not face the agony of death by cancer, why didn't he leave a note saying so, and every one would have understood and been quite 'nice' about it?" I really can't say. Perhaps he wished to leave trouble for her behind him; perhaps he divined the reason why she thought a day nurse unnecessary, and insisted on giving him his day medicines with her own fair hands. Perhaps he hoped for an open verdict. Perhaps he wasn't quite right in his mind. I have told you the story as I remember it and my memory is not perfect. Personally I've always been a bit sorry for Grimthorpe. It is quite possible that all those hints as to his "queerness" were invented by his wife to excuse herself. I only know that Science benefited greatly from his researches, and that he bequeathed some priceless collections to both branches of the British Museum. Some one once told me he had a heart somewhere and had loved intensely a sister much younger than himself and had only begun to be "queer" and secretive and bald after her premature death. I think also that in the last year of his life he was greatly embittered at not getting the expected peerage; after the trouble and disagreeableness he had gone through to obtain heirs for this distinction this poor little attempt at immortality which it is in the power of a Prime Minister to bestow.]
The Grand Jury returned a true bill against Lady Shillito. David had been studying the case from the morrow of the inquest, that is as soon as Rossiter had learnt of the coming trouble. The latter though he regarded Cousin Arbella as a rather amusing minx, an interesting type in modern psychology (though really her type is as old as—say—the Hallstadt period) had no wish to see her convicted of murder. Furthermore he was getting so increasingly interested in this clever David Williams that he would have liked to make his fortune by helping him to a sensational success as a pleader, to one of those cases which if successfully conducted mark out a path to the Bench. So he insisted that David Williams be briefed for the defence, and well fee'ed, in order that he might be able to devote all his time to the investigation of the mystery. David had an uphill task. He went down to the North in November, 1908, conferred with Lady Shillito's solicitors, and at great length with the curiously calm, ironly-resolved Lady Shillito herself. The evidence was too much against her for him to prevent her being committed for trial and lodged in reasonably comfortable quarters in Newcastle jail, or for the Grand Jury to find no true bill of indictment. But between these stages in the process and the actual trial for murder in February, 1909, David worked hard and accumulated conclusive evidence (with Rossiter's help) to prove his client's innocence of the deed of which she believed herself guilty. To punish her as she deserved he allowed her to think herself guilty till his defence of her began.