"I'm only too sure, son," was the grim answer.

CHAPTER III

ON THE TRAIL

Leaving Zeb Tauth to look after his own steed and that of Professor Wright, Bud and his cousins ushered the scientist into the living-room of the ranch house, whither Mr. Merkel and his fellow ranchmen returned, followed by his wife and daughter. Slim Degnan also entered, having turned his horse over to Babe, who, with the other cowboys, went to the corral.

"Now let's get the straight of this," suggested the owner of Diamond X ranch, when the party was again sitting down, and Professor Wright had been made welcome. "Slim, you saw what happened outside. Suppose you tell us about that."

"Seems to me that something more important happened in here," spoke Bud. "If your papers were stolen, Dad, why——"

"They sure were, son," interrupted Mr. Merkel, "but I have an idea that what went on outside had a very important bearing on what took place in here. That's why I wanted to hear Slim's account first."

"Well, there isn't an awful lot to tell," said the ranch foreman. "I was sitting outside the corral with the boys, sort of planning up the work for to-morrow. We were talking about this new move of the government, opening the Indian lands, and we were sort of guessing how soon the onery sheep men would bust in on us, when one of the boys—Snake Purdee I reckon it was—said somebody was coming up the trail that leads to Happy Valley.

"First we didn't pay much attention to them, thinking they was some of Bud's boys, but they acted so funny that I hailed 'em, and instead of answering like they should, they fired. Course I fired back—up in the air—and then we boys got busy and took after 'em."