"We're locked in," was the lugubrious response. "They planks a ladder up here in daytime, but we don't know what they does with it at night."

One of the two men of the submarine's crew bent down, while the second clambered on his shoulders. Even then, when both stood erect, the uppermost could not reach the side of the aperture.

By this time the crackle of musketry told the midshipman that the rest of his comrades were engaged with the scanty Turkish garrison. It was not Crosthwaite's intention to take the offensive, having once gained possession of the tower. All he meant to do was to hold the Turks in check until the prisoners were liberated, and then to return to the boats.

Farnworth was for the moment at a loss how to act. Without a ladder it seemed impossible to reach the opening in the vaulted roof. Time was of extreme importance, for the noise of the musketry might bring hostile patrol-boats upon the scene. It was even likely that the island was in telegraphic communication with Scutari and Constantinople, in which case a swift destroyer might put in an appearance before the landing-party returned to the submarine.

"Shall I fetch the hand lead-line, sir?" asked one of the seamen who had accompanied him. "There's one in the boat. We can sling it right over the tower."

"And then?" asked the midshipman.

"One of us'll swarm up. The line will hold, I'll allow."

"Carry on!" said Farnworth.

The man took to his heels and ran towards the pier. A long-drawn couple of minutes ensued, but he did not return. The firing seemed to increase. Evidently the numbers of the Turkish garrison were considerably in excess of what the landing-party had estimated. Instead of bolting precipitately, the soldiers were putting up a stiff fight.

The midshipman went to the door. On the threshold he nearly stumbled over the body of the messenger.