"Really?"

"Yes; I will mention one to you. He had a remarkably fine garden, full of vegetables, flowers, and fruit. From amongst these vegetables he selected the most simple -- a cabbage, for instance. For three days he watered this cabbage with a distillation of arsenic; on the third, the cabbage began to droop and turn yellow. At that moment he cut it. In the eyes of everybody it seemed fit for table, and preserved its wholesome appearance. It was only poisoned to the Abbe Adelmonte. He then took the cabbage to the room where he had rabbits -- for the Abbe Adelmonte had a collection of rabbits, cats, and guinea-pigs, fully as fine as his collection of vegetables, flowers, and fruit. Well, the Abbe Adelmonte took a rabbit, and made it eat a leaf of the cabbage. The rabbit died. What magistrate would find, or even venture to insinuate, anything against this? What procureur has ever ventured to draw up an accusation against M. Magendie or M. Flourens, in consequence of the rabbits, cats, and guinea-pigs they have killed? -- not one. So, then, the rabbit dies, and justice takes no notice. This rabbit dead, the Abbe Adelmonte has its entrails taken out by his cook and thrown on the dunghill; on this dunghill is a hen, who, pecking these intestines, is in her turn taken ill, and dies next day. At the moment when she is struggling in the convulsions of death, a vulture is flying by (there are a good many many vultures in Adelmonte's country); this bird darts on the dead fowl, and carries it away to a rock, where it dines off its prey. Three days afterwards, this poor vulture, which has been very much indisposed since that dinner, suddenly feels very giddy while flying aloft in the clouds, and falls heavily into a fish-pond. The pike, eels, and carp eat greedily always, as everybody knows -- well, they feast on the vulture. Now suppose that next day, one of these eels, or pike, or carp, poisoned at the fourth remove, is served up at your table. Well, then, your guest will be poisoned at the fifth remove, and die, at the end of eight or ten days, of pains in the intestines, sickness, or abscess of the pylorus. The doctors open the body and say with an air of profound learning, `The subject has died of a tumor on the liver, or of typhoid fever!'"

"But," remarked Madame de Villefort, "all these circumstances which you link thus to one another may be broken by the least accident; the vulture may not see the fowl, or may fall a hundred yards from the fish-pond."

"Ah, that is where the art comes in. To be a great chemist in the East, one must direct chance; and this is to be achieved." -- Madame de Villefort was in deep thought, yet listened attentively. "But," she exclaimed, suddenly, "arsenic is indelible, indestructible; in whatsoever way it is absorbed, it will be found again in the body of the victim from the moment when it has been taken in sufficient quantity to cause death."

"Precisely so," cried Monte Cristo -- "precisely so; and this is what I said to my worthy Adelmonte. He reflected, smiled, and replied to me by a Sicilian proverb, which I believe is also a French proverb, `My son, the world was not made in a day -- but in seven. Return on Sunday.' On the Sunday following I did return to him. Instead of having watered his cabbage with arsenic, he had watered it this time with a solution of salts, having their basis in strychnine, strychnos colubrina, as the learned term it. Now, the cabbage had not the slightest appearance of disease in the world, and the rabbit had not the smallest distrust; yet, five minutes afterwards, the rabbit was dead. The fowl pecked at the rabbit, and the next day was a dead hen. This time we were the vultures; so we opened the bird, and this time all special symptoms had disappeared, there were only general symptoms. There was no peculiar indication in any organ -- an excitement of the nervous system -- that was it; a case of cerebral congestion -- nothing more. The fowl had not been poisoned -- she had died of apoplexy. Apoplexy is a rare disease among fowls, I believe, but very common among men." Madame de Villefort appeared more and more thoughtful.

“What was this William doing there? Did he say anything before he died?”

“Not a word. He lives at the lodge with his mother, and as he was a very faithful fellow we imagine that he walked up to the house with the intention of seeing that all was right there. Of course this Acton business has put everyone on their guard. The robber must have just burst open the door — the lock has been forced — when William came upon him.”

“Did William say anything to his mother before going out?”

“She is very old and deaf, and we can get no information from her. The shock has made her half-witted, but I understand that she was never very bright. There is one very important circumstance, however. Look at this!”

He took a small piece of torn paper from a notebook and spread it out upon his knee.

“This was found between the finger and thumb of the dead man. It appears to be a fragment torn from a larger sheet. You will observe that the hour mentioned upon it is the very time at which the poor fellow met his fate. You see that his murderer might have torn the rest of the sheet from him or he might have taken this fragment from the murderer. It reads almost as though it were an appointment.”

Holmes took up the scrap of paper, a facsimile of which is here reproduced.

AT QUARTER TO TWELVE

LEARN WHAT

MAY

“Presuming that it is an appointment,” continued the inspector, “it is of course a conceivable theory that this William Kirwan, though he had the reputation of being an honest man, may have been in league with the thief. He may have met him there, may even have helped him to break in the door, and then they may have fallen out between themselves.”

“This writing is of extraordinary interest,” said Holmes, who had been examining it with intense concentration. “These are much deeper waters than I had thought.” He sank his head upon his hands, while the inspector smiled at the effect which his case had had upon the famous London specialist.

“Your last remark,” said Holmes presently, “as to the possibility of there being an understanding between the burglar and the servant, and this being a note of appointment from one to the other, is an ingenious and not entirely impossible supposition. But this writing opens up —” He sank his head into his hands again and remained for some minutes in the deepest thought. When he raised his face again I was surprised to see that his cheek was tinged with colour, and his eyes as bright as before his illness. He sprang to his feet with all his old energy.

“I’ll tell you what,” said he, “I should like to have a quiet little glance into the details of this case. There is something in it which fascinates me extremely. If you will permit me, Colonel, I will leave my friend Watson and you, and I will step round with the inspector to test the truth of one or two little fancies of mine. I will be with you again in half an hour.”