every once in a while taking great leaps and bounds, exactly like a giant foot-ball being kicked by invisible players. It made diagonally across the beach, and straight for the foot of one of the largest sand dunes. We chased along, thinking we'd get it at the foot of the hill; but not on your life!—it wasn't stopping there. It just kept right on up the smooth, steep side of that hill, driven by the wind, and looking like nothing but a blurred, whirling mass of gray.
"Oh, Chester, Chester," shrieked Twinny, jumping up and down, "do see, that's just exactlythe way you looked, only you were coming down instead of going up! Oh, I wonder if it wants to stop!"
"Well, it sure won't do it any good to want to," I said; "any more than it did me. There, it's almost at the top. Whoo! did you see her jump?" for when the gray ball reached the top of the dune, it gave a wild leap into the air, over the summit, and then down, out of sight on the other side.
"Let's get some more," I said, "and race 'em. That one went at least a quarter of a mile. The wind is in exactly the right direction to give 'em
