"Right. Dan'l, you take the brush and whitewash a narrow line right behind my hand as I move the string round."

Dan'l stooped down and rapidly painted in the circle, as the Forecaster moved the string.

"Next," said the Weather Man, "we'll make another circle, a little closer in."

"At any special distance, sir?" asked Anton.

"No," was the reply. "It doesn't matter. Any distance at all will do."

A second, and again a third circle was thus made.

"Tie a piece of rope around the pole," was the next direction, "as high as you can reach."

This only took a minute.

"Now, boys," the Forecaster said, "all that you have to do is to watch when the shadow of the rope crosses those three circles. Put in a peg this evening when it crosses the inside one, then the middle and then the outside. To-morrow morning, mark with pegs the place where the shadow crosses the same circles on the other side, only, of course, it will cross the outer one first."

"Then what shall we do, sir?" asked Anton.