He went out. Psmith looked at Billy.

"As Comrade Wheeler remarks," he said, "it is up to us. What do you propose to do about it? This is a move of the enemy which I have not anticipated. I had fancied that their operations would be confined exclusively to our two selves. If they are going to strew the street with our carriers, we are somewhat in the soup."

Billy said nothing. He was chewing the stem of an unlighted pipe. Psmith went on.

"It means, of course, that we must buck up to a certain extent. If the campaign is to be a long one, they have us where the hair is crisp. We cannot stand the strain. Cosy Moments cannot be muzzled, but it can undoubtedly be choked. What we want to do is to find out the name of the man behind the tenements as soon as ever we can and publish it; and, then, if we perish, fall yelling the name."

Billy admitted the soundness of this scheme, but wished to know how it was to be done.

"Comrade Windsor," said Psmith. "I have been thinking this thing over, and it seems to me that we are on the wrong track, or rather we aren't on any track at all; we are simply marking time. What we want to do is to go out and hustle round till we stir up something. Our line up to the present has been to sit at home and scream vigorously in the hope of some stout fellow hearing and rushing to help. In other words, we've been saying in the paper what an out-size in scugs the merchant must be who owns those tenements, in the hope that somebody else will agree with us and be sufficiently interested to get to work and find out who the blighter is. That's all wrong. What we must do now, Comrade Windsor, is put on our hats, such hats as Comrade Repetto has left us, and sally forth as sleuth-hounds on our own account."

"Yes, but how?" demanded Billy. "That's all right in theory, but how's it going to work in practice? The only thing that can corner the man is a commission."

"Far from it, Comrade Windsor. The job may be worked more simply. I don't know how often the rents are collected in these places, but I should say at a venture once a week. My idea is to hang negligently round till the rent-collector arrives, and when he has loomed up on the horizon, buttonhole him and ask him quite politely, as man to man, whether he is collecting those rents for himself or for somebody else, and if somebody else, who that somebody else is. Simple, I fancy? Yet brainy. Do you take me, Comrade Windsor?"

Billy sat up, excited. "I believe you've hit it."

Psmith shot his cuffs modestly.