“It is my business.”

With an effort Dr. Sterndale recovered his ruffled composure.

“I have no objection to telling you,” he said. “It was Mr. Roundhay, the vicar, who sent me the telegram which recalled me.”

“Thank you,” said Holmes. “I may say in answer to your original question that I have not cleared my mind entirely on the subject of this case, but that I have every hope of reaching some conclusion. It would be premature to say more.”

“Perhaps you would not mind telling me if your suspicions point in any particular direction?”

“No, I can hardly answer that.”

“Then I have wasted my time and need not prolong my visit.” The famous doctor strode out of our cottage in considerable ill-humour, and within five minutes Holmes had followed him. I saw him no more until the evening, when he returned with a slow step and haggard face which assured me that he had made no great progress with his investigation. He glanced at a telegram which awaited him and threw it into the grate.

“From the Plymouth hotel, Watson,” he said. “I learned the name of it from the vicar, and I wired to make certain that Dr. Leon Sterndale's account was true. It appears that he did indeed spend last night there, and that he has actually allowed some of his baggage to go on to Africa, while he returned to be present at this investigation. What do you make of that, Watson?”

“He is deeply interested.”

“Deeply interested—yes. There is a thread here which we had not yet grasped and which might lead us through the tangle. Cheer up, Watson, for I am very sure that our material has not yet all come to hand. When it does we may soon leave our difficulties behind us.”