token of his trade, in the shape of a new packing-case, stood on the pavement. The rest of the building showed nothing distinctive.
"There y'are, gents," said Mr. Moon, "if you want to watch, you're welcome, bein' the p'lice, which I allus does my best for, allus. But you'll have to excuse me now, 'cos o' the bar."
Mr. Moon stumped off downstairs, leaving Plummer and myself watching at the window.
"Your friend the publican seems very proud of helping the police," I remarked.
Plummer laughed. "Yes," he said, "or at any rate, he is anxious we shan't forget it. You see, it's in some way a matter of mutual accommodation. We make things as easy as possible for him on licensing days, and as he has a pretty extensive acquaintance among the sort of people we often want to get hold of, he has been able to show his gratitude very handsomely once or twice."
The house on which our eyes were fixed was a little too far up the street for us to see perfectly through the window of the second-floor, though we could see enough to indicate that it was furnished as an office. We agreed that the unknown second-floor tenant was more likely to be our customer, or connected with him, than either of the others. Still, we much desired a nearer view, and presently, since the
