“Nor I,” was Joe’s rejoinder; “and I don’t know that I should care to repeat the experience. But hullo!” he broke off suddenly, “what’s that? No, not over there; off this way!”

He pointed excitedly to a small black object, which, in the now clear atmosphere, was visible at the distance of about a mile to the southeast of them.

“It’s a boat,” announced Nat, after a brief scrutiny of the strange object.

CHAPTER IV.

PROFESSOR GRIGG AND MR. TUBBS.

“So it is. What on earth can it be doing out here? Wait a jiffy, I’ll go below and get the glasses.”

Joe, now fully recovered, dived into the after cabin and soon reappeared with a pair of powerful binoculars.

Nat focused them on the distant object, which, by this time, was visible, even to the naked eye, and reported it to be a small boat, painted white, and looking like a ship’s dinghy, or small lifeboat.

Excitement ran high on board the Nomad when Nat proclaimed that he was almost certain he had seen an arm wave from the small craft.

“I couldn’t be quite sure, though,” he admitted. “Here, Joe, you take a look.”