"Did Dr. Cavendish tell you that, Mr. Tatton?"

"Yes. Well, now, Sir Karl, that man is at the Maze still--I am convinced of it; and that man is Salter."

"What did you find this morning?"

"Nothing. Nothing more than I found before. When I spoke of the sick man, and asked where he was, this cock-and-bull tale was told me, which, of course, they had got up among themselves."

"As I said before, Mr. Tatton, I feel certain--I am certain--that you will never find Salter at the Maze; from the simple fact that he is not there to find--I am sure of it. I must most earnestly protest against these repeated annoyances to my tenant, Mrs. Grey; and if you do not leave her alone for the future, I shall see whether the law will not compel you. I do not--pray understand--I do not speak this in enmity to you, but simply to protect her."

"Of course I understand that, Sir Karl," was the ready answer. "There's no offence meant, and none taken. But if you could put yourself in my place, you'd see my difficulty. Upon my word, I never was so mystified before. There Salter is. Other people can see him, and have seen him; and yet, when I search I find no traces of him. A thought actually crossed my mind just now, whether there could be a subterranean passage from the Maze to Clematis Cottage, and that Salter makes his escape there to his cousin on occasion. I should like to search it."

"Come and do so at once," said Karl, half laughing. "Nothing convinces like ocular demonstration. I give you full permission, as owner of the cottage; I doubt not Smith will, as its tenant. Come and ask him."

The detective was in earnest, and they crossed over. Seeing them making for the gate, Mr. Smith came out of his house, pipe in hand. It was one of those long churchwardens. Karl spoke a few words of explanation. Mr. Detective Tatton suspected there might be secret rooms, or doors, or fugitives hidden in Clematis Cottage, and would like to search it. After the first momentary look of surprise, the agent remained unruffled.

"Pass on, sir," said he, extending the thin end of his pipe to indicate the way. "You are welcome. Go where you please: search into every nook and corner; up the spouts and down the drains. If you surprise old Betty, tell her you're the plumber."

Mr. Strange took him at his word. Karl and the agent waited in the sitting-room together.