midnight
So the night was divided into watches , and each lad took his turn on deck . The sky became overcast , so there was little light . The black shadow of the shore seemed potent with dangers . Bart had his second watch on deck , and it was not far from midnight when he was startled to hear a voice hailing from the shore : `` Ahoy , the yacht ! '' `` What do you want ? '' asked Bart , gripping a revolver and staring toward the point from which the voice had seemed to come . `` Who are you ? ''