"I'll do anything I can, Mr. Coysh," I went so far as to say. But I was already taken by surprise. And so, I could see, was Uvo Delavoye.

"I'll hold you to that," said Coysh frankly. "When did you see him last, Mr. Gillon?"

"Do you mean Mr. Royle?" I stammered, turning away from Delavoye. If only he had not been there!

"Of course I do; and let me tell you, Mr. Gillon, this is a serious matter for the man, you know. You won't improve his chances by keeping anything back. When did you see him last?"

"Monday night," I mumbled.

But Delavoye heard.

"Monday night?" he interjected densely. "Why, it was on Monday he went away!"

"Exactly--by the last train."

"But we heard they'd gone hours before!"

"We heard wrong, so far as Royle was concerned. I came across him after I left you, and I saw him off myself."

Coysh had a sharp eye on both of us, and Delavoye's astonishment was not lost upon him. But it was at me that he looked last and longest.

"And you keep this to yourself from Monday night till now?"

"What's about it?" I demanded, falling into my own vernacular in my embarrassment.

"It only looks rather as though you were behind the scenes," replied Coysh simply. And his honesty called to mine.

"Well, so I was, to a certain extent," I cried; "but I got there by accident, I blundered in where I wasn't wanted, and yet the fellow treated me like a gentleman! That's why I never gave it away. But," I added with more guile, "there was really nothing to give away." And with that I improvised a garbled version of my last little visit to the house with red blinds, which I did not say I had discovered in utter darkness, any more than I described the sound which had attracted my attention, or the state of the householder's nerves.

"Very good," said Coysh, making notes on an envelope. "And then you saw him off by the last train: did he say where 

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