Looking in the direction in which he was pointing, the Overland girls saw in the far distance a horseman, sitting his mount so motionless that at first they were not positive whether it were a horseman or a distorted cactus plant.

Grace ran for her binoculars and for some minutes studied the stranger.

"That's our caller," suggested Hippy.

Maybe he has decided to hang around for another meal. I don't know that I blame him."

"No, it is not the same man, at least not same pony," answered Grace, snapping glasses shut. "The man yonder is riding a black pony. The one who called on us rode a nearly white animal. I can't imagine why he is so interested, but he is surely watching us. However, we won't worry so long as we have a water tank at hand."

At four o'clock in the afternoon the mysterious stranger was still in practically the same place. He appeared to move only when his pony stepped forward a few paces for more sagebrush.

"Man b'longey top-side horse!" cried Ping, again pointing in another direction.

The Overlanders saw a cloud of dust rolling toward them over the desert, ahead of the cloud being a horseman riding at a swift gallop.

"This would seem to be our day at home, judging from the number of callers who are dropping in," observed Elfreda.

Grace threw up her glasses and took a quick look.