He could dimly discern two figures standing in the shadow of a great breakwater below him.

Then he bent himself to his task again; he seemed to be placing the cartridges under the great breakwater which he himself had proposed.

The great breakwater two hundred feet wide that ran out into the open sea was one of the greatest achievements of that building age.

By this time they had reached the end of the great breakwater, terminating in a lighthouse, the limit, on one side, of the inner harbor.