He drew his revolver and fired a volley of shots.

For reply, instead of a rush of startled townsfolk, a gray coyote silently slipped from a ruined barn and slunk across the prairie.

The truth burst on both the boys at once.

“The place is deserted,” exclaimed Harry.

“We can get some water there though, I guess, just the same,” replied the other. “There must be some wells left.”

They swooped down onto the silent, deserted town, in which the sand had drifted high in front of many of the houses. Eagerly they climbed out of the chassis of the aeroplane and investigated the place.

“Hurray,” suddenly shouted Harry, rushing up to a large building with a long porch, that had evidently once been the hotel, “here’s a pump.”

He pointed to an aged iron pump that stood in front of the tumbled down building. But the boys were doomed once more to disappointment. A few strokes of its clanking handle showed them that it was a long time since water had passed its spout. They investigated other wells with the same result.

The boys exchanged blank looks as they realized that they were to get no water there, but suddenly the realization that the auto was back there in the desert somewhere with a tank full of water cheered them.

“They’ve lots of water in the tank,” suggested Harry.