"How do you know?" asked Charley.
"Why it will begin running up about eight o'clock to-morrow, and of course it won't turn till about two."
"How do you know it will begin running up about eight o'clock?"
"Why, because it began running up a little after seven this morning."
"Well, what has that got to do with it? Don't it all depend on the wind?"
"What a landlubber you are!" exclaimed Ned. "No, it don't depend on the wind. It depends on the moon and the sun. I'll try to explain."
"No, don't," said Jack; "let him read about it in his geography, or explain it to him some other time. Tell us about something else now. Isn't the country fever likely to bother us over there on the island?"
"No, not if we select a good place to camp in. We must get on pretty high ground near the salt water. I know the look of healthy and unhealthy places pretty well, and we'll be safe enough."
"All right. When we get into camp you can deliver that lecture on tides if you want to, but just now we wouldn't attend to it. We're apt to be a trifle cross in the evenings over there if we get tired. Tired people in camp are always cross, and it will be just as well to save whatever you have to say till we need something to talk about. Then you can tell us all about it."
"Well, now, I've something interesting to tell you without waiting," said Ned; "something very interesting."