They're rising." "Dat's so," said Dick.

"And I's awful hungry, I is." "The Swallow" was well enough provisioned for a short cruise, not to mention the bluefish, and there was water enough on board for several days if they should happen to need it; but there was little danger of that, unless the wind should continue to be altogether against them.
It was blowing hard when the boys finished their dinner, but no harder than it had already blown several times that day; and "The Swallow" seemed to be putting forth her very best qualities as a "sea-boat." There was no immediate danger apparently; but there was one "symptom" which Dab discerned, as he glanced around the horizon, which gave him more anxiety than either the stiff breeze or the rough sea.
The coming darkness?
No; for stars and lighthouses can be seen at night, and steering by them is easy enough.
Nights are pretty dark things, sometimes, as most people know; but the darkest thing to be met with at sea, whether by night or by day, is a _fog_, and Dabney saw signs of one coming.

Rain, too, might come with it, but that would be of small account.
"Boys," he said, "do you know we're out of sight of land ?" "Oh, no, we're not!" replied Ford confidently.

"Look yonder." "That isn't land, Ford.

That's only a fog-bank, and we shall be all in the dark in ten minutes.