After some ten minutes' steady walking, Calendar turned aside with a muttered word, and dived down a covered, dark and evil-smelling passageway that seemed to lead toward the river.

Mastering his involuntary qualms, Kirkwood followed.

Some ten or twelve paces from its entrance the passageway swerved at a right angle, continuing three yards or so to end in a blank wall, wherefrom a flickering, inadequate gas-lamp jutted. At this point a stone platform, perhaps four feet square, was discovered, from the edge of which a flight of worn and slimy stone steps led down to a permanent boat-landing, where another gas-light flared gustily despite the protection of its frame of begrimed glass.

"Good Lord!" exclaimed the young man. "What, in Heaven's name, Calendar—?"

"Bermondsey Old Stairs. Come on."

They descended to the landing-stage. Beneath them the Pool slept, a sheet of polished ebony, whispering to itself, lapping with small stealthy gurgles angles of masonry and ancient piles. On the farther bank tall warehouses reared square old-time heads, their uncompromising, rugged profile relieved here and there by tapering mastheads. A few, scattering, feeble lights were visible. Nothing moved save the river and the wind.

The landing itself they found quite deserted; something which the adventurer comprehended with a nod which, like its accompanying, inarticulate ejaculation, might have been taken to indicate either satisfaction or disgust. He ignored Kirkwood altogether, for the time being, and presently produced a small, bright object, which, applied to his lips, proved to be a boatswain's whistle. He sounded two blasts, one long, one brief.

There fell a lull, Kirkwood watching the other and wondering what next would happen. Calendar paced restlessly to and fro upon the narrow landing, now stopping to incline an ear to catch some anticipated sound, now searching with sweeping glances the black reaches of the Pool.

Finally, consulting his watch, "Almost ten," he announced.

"We're in time?"