Having revealed their identity, Dick and his companion were taken below and furnished with dry clothing. Quickly the Sub returned on deck and approached the Lieutenant-Commander on the bridge.

"Field-pieces lowered over the cliff, eh?" ejaculated that officer. "Jolly plucky of those fellows. We're engaged in trying to draw their fire. Sorry I can't put you on board the Hammerer. The battleships and cruisers have withdrawn until the mine-field is cleared a little higher up. They're going to tackle Chanak and Kilid Bahr to-morrow. We're just off to reconnoitre. The Calder's taking the European and the Irwell is trying her luck on the Asiatic side."

"Can I be of any service, sir?"

"I'm afraid not—as far as I can see at present. We'll find room for you in the conning-tower."

The Calder's search-lights had now been switched off. She was steaming slowly in a northerly direction, and had already passed the innermost of the mine-sweepers and their attendant destroyers.

Dick entered the limited expanse of the conning-tower, in which was a Naval Reserve sub-lieutenant and two seamen. The Lieutenant-Commander, called by courtesy the Captain, stood without on the bridge, in company with the mate and a yeoman of signals.

Presently the Lieutenant-Commander glanced at the luminous dial of his watch.

"Time!" he exclaimed decisively, in the tone of a referee at a boxing tournament. "Full speed ahead."

The engine-room telegraph-bell clanged. Black smoke tinged with lurid red flames belched from the four squat funnels, and, like a hound released from leash, the Calder raced on her perilous mission, her whole fabric quivering under the rapid pulsations of her engines.

The Calder was not one of the latest type of destroyers. Her tonnage was a little over 550, her speed supposed to be 24 knots, but by dint of terrific exertion on the part of her "black squad" that rate was considerably exceeded.