artificer and general "familiar"—setting out the tea-tray on a small table. The little man shook hands cordially with me, and his face crinkled up into the sort of smile that one might expect to see on a benevolent walnut.
"We've often talked about you, sir," said he. "The doctor was wondering only yesterday when you were coming back to us."
As I was not "coming back to them" quite in the sense intended I felt a little guilty, but reserved my confidences for Thorndyke's ear and replied in polite generalities. Then Polton fetched the tea-pot from the laboratory, made up the fire and departed, and Thorndyke and I subsided, as of old, into our respective arm-chairs.
"And whence do you spring from in this unexpected fashion?" my colleague asked. "You look as if you had been making professional visits."
"I have. The base of operations is in Lower Kennington Lane."
"Ah! Then you are 'back once more on the old trail'?"
"Yes," I answered, with a laugh, "'the old trail, the long trail, the trail that is always new.'"
"And leads nowhere," Thorndyke added grimly.
I laughed again; not very heartily, for there was an uncomfortable element of truth in my friend's remark, to which my own experience bore only too complete testimony. The medical practitioner whose lack of means forces him to subsist by taking temporary charge of other men's practices is apt to find that the passing years bring
