"The iron trails have put the old cow trails out of business."

"Iron trails?" wondered Tad.

"Railroads. We men of the plains refer to them as the iron trails. That's what they are in reality. Professor, do you wish the boys to take their turns on the herd to-night?"

"As you wish, Mr. Stallings. I presume they will be anxious to begin their life as cowboys. I understand that's an ambition possessed by most of your American boys."

"All right," laughed the foreman. "I'll send them out as I find I can, with some of the other cowpunchers, until they learn the ropes. There is too great a responsibility on a night man to trust the boys alone with that work now. But they can begin if they wish. I'll see first how the bunch get back from their celebration of the glorious Fourth. You'll come out and have supper with us?"

"No, I think not. We shall ride out just after supper, if you will have some one to show us the way," answered the Professor.

"Sure, I'll send in Big-foot Sanders to pilot you out. You boys need not be afraid of Big-foot. He's not half so savage as he looks, but he's a great hand with cows."

Big-foot Sanders rode up to the hotel shortly after six o'clock. Leading his pony across the sidewalk, he poked his shaggy head just inside the door of the hotel.

"Ki-yi!" he bellowed, causing everybody within hearing of his voice to start up in alarm. "Where's that bunch of tenderfeet?"

"Are you Mr. Sanders, from the Miller outfit?" asked the Professor, stepping toward him.