seven o'clock
To hide his own agitation Billy walked to the window and turned his back . Night had fallen and the electric lights , that once had been his care , sprang into life . Billy looked at his watch . It was seven o'clock . The window gave upon the harbor , and a mile from shore he saw the cargo lights of the _ Prinz der Nederlanden _ , and slowly approaching , as though feeling for her berth , a great battleship . When Billy turned from the window his voice was apparently undisturbed . `` We 've got to hurry , '' he said .