I could not quite comprehend all this. If so large a sum as £1500 was really coming to the young man, why should Jackson wince as he did at disbursing small amounts which he could repay himself with abundant interest? If otherwise—and it was probable he should not be repaid—what meant his eternal, “fine generous lad!” “spirited young man!” and so on? What, above all, meant that look of diabolical hate which shot out from his cavernous eyes towards Henry Rogers when he thought himself unobserved, just after satisfying a fresh claim on his purse? Much practice in reading the faces and deportment of such men made it pretty clear to me that Jackson’s course of action respecting the young man and his money was not yet decided upon in his own mind; that he was still perplexed and irresolute; and hence the apparent contradiction in his words and acts.

Henry Rogers at length dropped asleep with his head upon one of the settle-tables; Jackson sank into sullen silence; the noisy room grew quiet; and I came away.

I was impressed with a belief that Jackson entertained some sinister design against his youthful and inexperienced lodgers and I determined to acquaint them with my suspicions. For this purpose Mr. Morgan, who had a patient living near Jackson’s house, undertook to invite them to tea on some early evening, on the pretence that he had heard of a tavern that might suit them when they should receive their fortune. Let me confess, too, that I had another design besides putting the young people on their guard against Jackson. I thought it very probable that it would not be difficult to glean from them some interesting and suggestive particulars concerning the ways, means, practices, outgoings and incomings, of their worthy landlord’s household.

Four more days passed unprofitably away, and I was becoming weary of the business, when about five o’clock in the afternoon the apothecary galloped up to his door on a borrowed horse, jumped off with surprising celerity, and with a face as white as his own magnesia, burst out as he hurried into the room where I was sitting: “Here’s a pretty kettle of fish! Henry Rogers has been poisoned, and by his wife!”

“Poisoned!”

“Yes, poisoned; although, thanks to my being on the spot I think he will recover. But I must instantly to Dr. Edwards: I will tell you all when I return.”

The promised “all” was this: Morgan was passing slowly by Jackson’s house, in the hope of seeing either Mr. or Mrs. Rogers, when the servant-woman, Jane Riddet, ran out and begged him to come in, as their lodger had been taken suddenly ill. Ill indeed! The surface of his body was cold as death, and the apothecary quickly discovered that he had been poisoned with sulphuric acid (oil of vitriol), a quantity of which he, Morgan, had sold a few days previously to Mrs. Rogers, who, when purchasing it, said Mr. Jackson wanted it to apply to some warts that annoyed him. Morgan fortunately knew the proper remedy, and desired Jackson, who was in the room, and seemingly very anxious and flurried, to bring some soap instantly, a solution of which he proposed to give immediately to the seemingly dying man. The woman-servant was gone to find Mrs. Rogers, who had left about ten minutes before, having first made the tea in which the poison had been taken. Jackson hurried out of the apartment, but was gone so long that Morgan, becoming impatient, scraped a quantity of plaster off the wall, and administered it with the best effect. At last Jackson came back, and said there was unfortunately not a particle of soap in the house. A few minutes afterwards the young wife, alarmed at the woman-servant’s tidings, flew into the room in an agony of alarm and grief. Simulated alarm, crocodile grief, Mr. Morgan said; for there could, in his opinion, be no doubt that she had attempted to destroy her husband. Mr. Jackson, on being questioned, peremptorily denied that he had ever desired Mrs. Rogers to procure sulphuric acid for him, or had received any from her—a statement which so confounded the young woman that she instantly fainted. The upshot was that Mrs. Rogers was taken into custody and lodged in prison.

This terrible news flew through Farnham like wild-fire. In a few minutes it was upon everybody’s tongue: the hints of the quarrelsome life the young couple led, artfully spread by Jackson, were recalled, and no doubt appeared to be entertained of the truth of the dreadful charge. I had no doubt either, but my conviction was not that of the Farnham folk. This, then, was the solution of the struggle I had seen going on in Jackson’s mind; this the realization of the dark thought which I had imperfectly read in the sinister glances of his restless eyes. He had intended to destroy both the husband and wife—the one by poison, and the other by the law! Doubtless, then, the £1500 had been obtained, and this was the wretched man’s infernal device for retaining it! I went over with Morgan early the next morning to see the patient, and found that, thanks to the prompt antidote administered, and Dr. Edwards’ subsequent active treatment, he was rapidly recovering. The still-suffering young man, I was glad to find, would not believe for a moment in his wife’s guilt. I watched the looks and movements of Jackson attentively—a scrutiny which he, now aware of my vocation, by no means appeared to relish.

“Pray,” said I, suddenly addressing Riddet, the woman-servant—“pray, how did it happen that you had no soap in such a house as this yesterday evening?”

“No soap!” echoed the woman, with a stare of surprise. “Why”——