“It is really a most remarkable thing,” he said, “but it almost looks as if you were right, after all. He is certainly much better. But tell me, would this treatment produce a similar improvement if the symptoms were due to disease?”

“No,” I answered, “it certainly would not.”

“Then that seems to settle it. But it is a most mysterious affair. Can you suggest any way in which he can have concealed a store of the drug?”