“We shall have to walk now for a block or two. I’m anxious to attract no attention, nor is it desirable for you to do so. If you can manage to act as if you were accustomed to the place and just leave all the talking to me, we ought to get along first-rate. Don’t be astonished at anything you see, and trust me for the rest; that’s all.”

They alighted, and he dismissed the taxicab. Some clock in the neighbourhood struck the hour of ten. “Good! we shall be in time,” muttered the detective, and led the way down the street and round a corner or so, till they came to a block darker than the rest, and much less noisy.

It had a sinister look, and George, who is brave enough under all ordinary circumstances, was glad that his companion wore a badge and carried a whistle. He was also relieved when he caught sight of the burly form of a policeman in the shadow of one of the doorways. Yet the houses he saw before him were not so very different from those they had already passed. His uneasiness could not have sprung from them. They had even an air of positive respectability, as though inhabited by industrious workmen. Then, what was it which made the close companionship of a member of the police so uncommonly welcome? Was it a certain aspect of solitariness which clung to the block, or was it the sudden appearance here and there of strangely gliding figures, which no sooner loomed up against the snowy perspective, than they disappeared again in some unseen doorway?

“There’s a meeting on to-night, of the Associated Brotherhood of the Awl, the Plane and the Trowel (whatever that means), and it is the speaker we want to see; the man who is to address them promptly at ten o’clock. Do you object to meetings?”

“Is this a secret one?”

“It wasn’t advertised.”

“Are we carpenters or masons that we can count on admittance?”

“I am a carpenter. Don’t you think you can be a mason for the occasion?”

“I doubt it, but—”

“Hush! I must speak to this man.”