The Student had let the old house to the Urchin's father. He was a tall, thin man with a hooked nose, and he knew more about one particular family of Coleoptera than anyone living. He had taken the place, not because he wanted it for its shooting, but because one of the beetles of his family was reputed to be plentiful in the neighborhood. He was never there long; he was never anywhere long. For thirty years he had pursued his beetles over five continents; his measurements of their wing cases alone filled nine enormous MS. volumes. His great work on the variation of the length of the wing case in beetles kept in captivity had become a classic. Scientific men had nothing but praise for the book; several even read it. The majority believed that he had re-founded Neo-Mendelism past any overthrowing; a small but persistent minority argued that, on the contrary, he had utterly overthrown the Neo-Mendelians. All, however, agreed that the book was epoch-making, even though they differed utterly as to the sort of epoch which it made. The author himself was a shy and modest person, who never lost his temper except when people sent him unpaid parcels from Timbuctoo or Khamchatka containing beetles of other families in which he took no interest. On the rare occasions when he could be induced to go into society, kind-hearted hostesses, who saw no reason why one crawling thing should not do as well as another had been known to try to please him by starting a conversation about ladybirds or earwigs; and it was said to be worth foregoing one's cigar to hear him explain, with a chuckle, that though earwigs or ladybirds were no doubt meritorious creatures in their several spheres, and possibly legitimate objects of study to others, they were not his subject; his subject was a particular family of Coleoptera. He and the Student had become great friends, and when he was in the island he would often drop in to see the Student's bookroom after dinner and there the two would sit, one on either side of the fire, each smoking at a tremendous pace and talking hard on his own subject. Neither ever expected an answer from the other; neither ever got one. But they had silently established an unwritten law that when one had talked for three minutes by the clock on the mantelpiece he was to stop and let the other have a turn; and when at last they said good night, each felt that they had both had a thoroughly enjoyable evening. And so they had.