So the Bishop sat, thinking, and gazing at the sea where the island had disappeared. And the moonlight flickered before his eyes, sparkling, now here, now there, upon the waves. Suddenly he saw something white and shining, on the bright path which the moon cast across the sea. Was it a seagull, or the little gleaming sail of some small boat? The Bishop fixed his eyes on it, wondering.

“It must be a boat sailing after us,” thought he, “but it is overtaking us very rapidly. It was far, far away a minute ago, but now it is much nearer. It cannot be a boat, for I can see no sail; but whatever it may be, it is following us, and catching us up.”

And he could not make out what it was. Not a boat, nor a bird, nor a fish! It was too large for a man, and besides a man could not be out there in the midst of the sea. The Bishop rose, and said to the helmsman: