Read The Cruise of the O Moo Storyline:
Lucile Tucker stirred in her berth, opened her eyes drowsily, then half-framed a thought into a whispered: “What was that?” The next instant she sat bolt upright. She had heard it again, this time not in a dream. It was a faint rat-tat-tat, with a hollow sound to it as if beaten on the head of a barrel.Pages of The Cruise of the O Moo :