"How do you mean, Hi?" questioned Lieutenant Wingate.

"By digging in and poking about in the tank they have managed to start the water seeping deeper into the ground until it finally found a new course and disappeared. It's an old Indian trick they've worked on us."

"Is it possible that men can be so desperate?" wondered Anne
Nesbit.

"Men!" exploded the guide. "They're not men. They're low-down hounds!"

"Why should they wish to do these things to us?" demanded Nora, flushing with resentment.

"There were three men in the party this time, one being the same fellow that has followed us most of the way out here. I don't know who the others are. It isn't so much the water that's bothering me as it is that they don't come out and face us if they have a grudge to settle with us. I'm ready to meet them and I reckon you folks are too."

"I think it would be a relief to have them do so," agreed Elfreda Briggs. "This constant tormenting gets on one's nerves after a time."

"What is your plan? I know you have one, Mr. Lang," spoke up
Grace.

"The clouds are making up in the south, and in a couple of hours they will hide the moon. It isn't advisable to do anything until the night gets good and dark, so I suggest that you folks lie down and get some rest, for we have a long, hard ride ahead of us."

"To-night? Ride to-night?" questioned Emma.