Nat looked seaward. Dark, streaky clouds were beginning to overcast the sky. The sea had turned dull and leaden, while a hazy sort of veil obscured the sun. He turned to Joe.

“Hustle below and tell Ding-dong to get all he can out of the engines, and then see that all is snug in the cabin.”

“You think we’re in for a blow?”

“I certainly do; and I’m afraid that it’s going to hit us before we can get ashore. It is going to be a hummer, too, from the looks of things, right out of the nor’west.”

“But we’re all right?”

“Oh, sure! The Nomad can stand up where a bigger craft might get into trouble.”

Nat’s tone was confident, but as Joe dived below on his errand he glanced behind him at the purplish-black clouds that were racing across the sky toward them. The sea began to rise and there was an odd sort of moaning sound in the air, like the throbbing of the bass string of a titanic viol.

“This is going to be a rip snorter,” he said in an undertone. “I’ll bet the bottom’s tumbled out of the barometer.”

CHAPTER III.

IN THE GRIP OF THE STORM.