"It's cooler up here than down below," remarked Tom, as he shifted the wheel and rudder a bit, in response to a gust of wind, that heeled the craft over.
"Yes, I think we're going to have a storm," remarked Mr. Sharp, eyeing the clouds with a professional air. "We may run ahead of it, or right into it. We'll go down a bit, toward night, when there's less danger of being shot."
So far, on their return trip, they had not been low enough, in the day time, to be in any danger from persons who hoped to earn the five thousand dollars reward.
The afternoon passed quickly, and it got dark early. There was a curious hum to the wind, and, hearing it, Mr. Sharp began to go about the ship, seeing that everything was fast and taut.
"We're going to have a blow," he remarked, "and a heavy one, too. We'll have to make everything snug, and be ready to go up or down, as the case calls for."
"Up or down?" inquired Mr. Damon.
"Yes. By rising we may escape the blow, or, by going below the strata of agitated air, we may escape it."
"How about rain?"
"Well, you can get above rain, but you can't get below it, with the law of gravitation working
