"You were talking about cases," says the outsider, jerking the ink down into his stylographic pen. "Well, take a common complaint which kills many thousands every year, like G.P. for instance." "What's G.P.?" "General practitioner," suggests the surgeon with a grin. "The British public will have to know what G.P. is," says the alienist gravely. "It's increasing by leaps and bounds, and it has the distinction of being absolutely incurable. General paralysis is its full title, and I tell you it promises to be a perfect scourge. Here's a fairly typical case now which I saw last Monday week. A young farmer, a splendid fellow, surprised his friends by taking a very rosy view of things at a time when the whole country-side was grumbling. He was going to give up wheat, give up arable land, too, if it didn't pay, plant two thousand acres of rhododendrons and get a monopoly of the supply for Covent Garden--there was no end to his schemes, all sane enough but just a bit inflated. I called at the farm, not to see him, but on an altogether different matter. Something about the man's way of talking struck me and I watched him narrowly. His lip had a trick of quivering, his words slurred themselves together, and so did his handwriting when he had occasion to draw up a small agreement. A closer inspection showed me that one of his pupils was ever so little larger than the other. As I left the house his wife came after me. 'Isn't it splendid to see Job looking so well, doctor?' said she; 'he's that full of energy he can hardly keep himself quiet.' I did not say anything, for I had not the heart, but I knew that the fellow was as much condemned to death as though he were lying in the cell at Newgate. It was a characteristic case of incipient G.P." "Good heavens!" cries the outsider. "My own lips tremble. I often slur my words. I believe I've got it myself." Three little chuckles come from the front of the fire. "There's the danger of a little medical knowledge to the layman." "A great authority has said that every first year's student is suffering in silent agony from four diseases," remarks the surgeon. "One is heart disease, of course; another is cancer of the parotid. I forget the two other." "Where does the parotid come in?" "Oh, it's the last wisdom tooth coming through!" "And what would be the end of that young farmer?" asks the outsider. "Paresis of all the muscles, ending in fits, coma and death. It may be a few months, it may be a year or two. He was a very strong young man and would take some killing." "By the way," says the alienist, "did I ever tell you about the first certificate I ever signed? I stood as near ruin then as a man could go." "What was it, then?"