"Hurrah!" Rance threw water on the sail; where he learned that was a mystery. The effect was felt at once. The cloth swelled, became impervious to the wind, and the boat swept steadily forward.

Lincoln was cautious. "That is all right—the question is, can we get back?"

"You wait an' see me tack."

"All right. Tack or nail, only let's see you get back where we started from." Lincoln was skeptical of sailboats. He had heard about sailing "just where you wanted to go," but he had his doubts about it.

The boat obeyed the rudder nicely, came around slowly, and started in on a new tack smoothly and steadily. After this successful trip, the boys did little else but sail.

"I'm going up to town with it after dinner," Rance announced. But when they came out after dinner, they found the sky overcast and a strong breeze blowing from the southwest.

Milton refused to experiment. "I'd sooner walk than ride in your boat," he explained.

"All right; you pays your money—you takes your choice," replied Rance.

The boat drove out into the lake steadily and swiftly, making the water ripple at the stern delightfully; but when they got past a low-lying island where the waves ran free, the ship began to heave and slide wildly, and Lincoln grew a little pale and set in the face, which made Rance smile.

"This is something like it. I'm going to go out about half a mile, then strike straight for the town."