"Intuition," I answered. He pouted his under lip above the upper one, with a dubious acquiescence. "Inference, I call it," he retorted. "All woman's so-called intuition is, in fact, just rapid and half-unconscious inference." He was so full of the subject, however, and so utterly carried away by his scientific ardour, that I regret to say he gave a strong dose of lethodyne at once to each of the matron's petted and pampered Persian cats, which lounged about her room and were the delight of the convalescents. They were two peculiarly lazy sultanas of cats--mere jewels of the harem--Oriental beauties that loved to bask in the sun or curl themselves up on the rug before the fire and dawdle away their lives in congenial idleness. Strange to say, Hilda's prophecy came true. Zuleika settled herself down comfortably in the Professor's easy chair and fell into a sound sleep from which there was no awaking; while Roxana met fate on the tiger-skin she loved, coiled up in a circle, and passed from this life of dreams, without knowing it, into one where dreaming is not. Sebastian noted the facts with a quiet gleam of satisfaction in his watchful eye, and explained afterwards, with curt glibness to the angry matron, that her favourites had been "canonised in the roll of science, as painless martyrs to the advancement of physiology." The weasels, on the other hand, with an equal dose, woke up after six hours as lively as crickets. It was clear that carnivorous tastes were not the whole solution, for Roxana was famed as a notable mouser. "Your principle?" Sebastian asked our sibyl, in his brief, quick way. Hilda's cheek wore a glow of pardonable triumph. The great teacher had deigned to ask her assistance. "I judged by the analogy of Indian hemp," she answered. "This is clearly a similar, but much stronger, narcotic. Now, whenever I have given Indian hemp by your direction to people of sluggish, or even of merely bustling temperament, I have noticed that small doses produce serious effects, and that the after-results are most undesirable. But when you have prescribed the hemp for nervous, overstrung, imaginative people, I have observed that they can stand large amounts of the tincture without evil results, and that the after-effects pass off rapidly. I who am mercurial in temperament, for example, can take any amount of Indian hemp without being made ill by it; while ten drops will send some slow and torpid rustics mad drunk with excitement--drive them into homicidal mania." Sebastian nodded his head. He needed no more explanation. "You have hit it," he said. "I see it at a glance. The old antithesis! All men and all animals fall, roughly speaking, into two great divisions of type: the impassioned and the unimpassioned; the vivid and the phlegmatic. I catch your drift now. Lethodyne is poison to phlegmatic patients, who have not active power enough to wake up from it unhurt; it is relatively harmless