The boys roared. “I knew you’d find something,” cried Tom. “Why, I thought the cat belonged to the crew. Why don’t you kill her or something if she’s such bad luck?”

“Kill her!” exclaimed the old man. “By the eternal, don’t ye know no more’n thet? Ye mought jes as well kill a Mother Cary’s chicken or a bo’sun bird. No sirree! Let good enough alone’s my motter.”

“Well, you are the most superstitious old whaleman I ever saw,” laughed Tom. “I’ll bet the cat’s what brought the good luck.”

Cap’n Pem snorted. “Ye mark my words,” he muttered as he strode aft. “We’ll be gittin’ inter some sort o’ mess long o’ that there cat yit.”

But for the next three or four days none on the Narwhal could have asked for better weather. The breeze, though light, was fair and steady. The sea ran in long, easy swells and the schooner, curtseying gently and with every stitch of canvas set, pressed steadily on her course.

Then one night the boys were awakened by the tolling of a bell and the ear-splitting screech of a horn. Hastily throwing on a few clothes, they hurried on deck.

At the first glance about they realized what the trouble was. The man at the wheel was barely visible, although less than a dozen feet distant. The faint light of the binnacle was a mere glow and the sails, spars, and forward part of the vessel melted into nothingness. The Narwhal was enveloped in a dense fog.

From the unseen bows of the ship came the monotonous tolling of the bell. At intervals the raucous horn screeched from the blanket of gray mist. Borne in strangely ghostly fashion from the blackness, came the voices of men.

Tom glanced at his watch and found that it was nearly sunrise but nowhere was there a hint of light or of dawn.

“Gosh, but it’s thick!” exclaimed Tom. “I wonder where we are.”