He left me at the post of observation, and presently I saw him lounging along on the other side of the way, keeping close to the houses, so as to escape observation from the upper windows. He took a good look at the names on the door-post of No. 8, and presently stepped within.

I waited five or six minutes, and then saw him returning as he had come.

"It's the top floors we want," he said, when he rejoined me in Mr. Moon's sitting-room. "The packing-case maker is genuine enough, and very busy. So is the fancy-goods agent. I went in, seeing the door wide open, and found the agent, a little, shop-walkery sort of chap, hard at work with his clerk among piles of cardboard boxes. I wouldn't go further, in case I were spotted. Do you think you'd be cool enough to do it without arousing suspicion? Mayes doesn't know you, you see. What do you think? We don't want to precipitate matters till we hear from Hewitt, but on the other hand I don't want to sit still as long as anything can be ascertained. You might ask a question about book-binding."

"Of course," I said. "If you will let me I'll go at once—glad of the chance to get a peep. I'll bespeak a quotation for binding and lettering a thousand octavos in paste grain, on behalf of some convenient firm of publishers. That would be technical enough, I think?"

I took my hat and walked out as Plummer had done, though, of course, I approached the door of No. 8 with less caution. The packing-case maker's men were hammering away merrily, and as I mounted the stairs I saw the little fancy-goods agent among his cardboard boxes, just as Plummer had said. The upper part of the house was a silent contrast to the busy lower floors, and as I arrived at the next landing I was surprised to see the door ajar.

I pushed boldly in, and found myself alone in a good-sized room plainly fitted as an office. There were two windows looking on the street, and one at the back, more than half concealed behind a ground glass partition or screen. I stepped across and looked out of this window. It looked on a narrow space, or well, of plain brick wall, containing nothing but a ladder, standing in one corner. And the only other window giving on this narrow square space was in the opposite wall, but much lower, on the ground level.

I saw these things in a single glance, and then I turned—to find myself face to face with a tallish, thin, active man, with a pale, shaven, ascetic face, dark hair, and astonishingly quick glittering black eyes. He stood just within the office door, to which he must have come without a sound, looking at me with a mechanical smile of inquiry, while his eyes searched me with a portentous keenness.

"Oh," I said, with the best assumption of carelessness I could command, "I was looking for you, Mr. Richardson. Do you care to give a quotation for binding at per thousand crown octavo volumes in paste grain, plain, with lettering on back?"

"No," answered the man with the eyes, "I don't; I'm afraid my carelessness has led you into a mistake. I am not Richardson the bookbinder. He was my predecessor in this office, and I have neglected to paint out his name on the door-post."

I hastened to apologise. "I am sorry to have intruded," I said. "I found the door ajar and so came in. You see the publishing season is beginning, and our regular binders are full of work, so that we have to look elsewhere. Good-day!"