"It is there. The second on the left."

"Dear me, it seems hardly accessible. And yet you will observe that there is a creeper below and a water-pipe above which give some foothold."

"I could not climb it myself," said Mr. Bennett.

"Very likely. It would certainly be a dangerous exploit for any normal man."

"There was one other thing I wished to tell you, Mr. Holmes. I have the address of the man in London to whom the Professor writes. He seems to have written this morning and I got it from his blotting-paper. It is an ignoble position for a trusted secretary, but what else can I do?"

Holmes glanced at the paper and put it into his pocket.

"Dorak—a curious name. Slavonic, I imagine. Well, it is an important link in the chain. We return to London this afternoon, Mr. Bennett. I see no good purpose to be served by our remaining. We cannot arrest the Professor, because he has done no crime, nor can we place him under constraint, for he cannot be proved to be mad. No action is as yet possible."

"Then what on earth are we to do?"

"A little patience, Mr. Bennett. Things will soon develop. Unless I am mistaken next Tuesday may mark a crisis. Certainly we shall be in Camford on that day. Meanwhile, the general position is undeniably unpleasant, and if Miss Presbury can prolong her visit——"

"That is easy."