come to the house that night⁠—the stranger whom he met just by the gate. At first glance it would seem that our problem was solved, and that the stranger went to the summerhouse to meet Ursula Bourne. It was fairly certain that he did go to the summerhouse because of the goose quill. That suggested at once to my mind a taker of drugs⁠—and one who had acquired the habit on the other side of the Atlantic where sniffing ‘snow’ is more common than in this country. The man whom Dr. Sheppard met had an American accent, which fitted in with that supposition.