"Well, when we leave the river, instead of riding toward that bunch of trees, we'll ride the other way. That will bring us to the railroad track near the curve. Then we'll ride up the track. If we do not reach the station before the train leaves, we can flag it. There is sure to be at least half a dozen guards aboard. We will make ten. Most of the men aboard will have revolvers. The result will be that instead of the bandits taking the train by surprise, we will take them by surprise, and----" "And the army that takes the other by surprise wins," finished Billie, taking off his sombrero and bowing to Adrian in mock gravity. Then to Pedro, "Let the scout lead the way and the army will fall in behind, with the general at the head." A laugh followed Billie's words, and putting spurs to their horses, the four lads dashed down the mountain road upon their self-appointed mission, which was by no means the first daring adventure in which they had engaged; for the stories of the doings of the three American lads in the quartette have furnished interesting reading for thousands of American boys. It is because of their numerous adventures and their skill as horsemen that the trio has become known as the Broncho Rider Boys. Their names are Donald Mackay, Adrian Sherwood and William Stonewall Jackson Winkle, better known as "Broncho Billie." This latter name was given him some two years before when he went to visit his cousin Donald at the latter's home on the Keystone Ranch in Wyoming. It was not given him because he was such an expert rider, but because he could fall from his broncho pony easier than any boy in that section. Rotund in appearance, he was as jolly as he was fat, and his chief failing was his appetite. No matter what the hour, no one ever mentioned eats that Billie was not hungry. When he first came West he was supposed to be in poor health. It speedily developed that such was not the case. He was simply hungry. Months in the open air had enabled him to eat without fear and he was now about the most robust specimen of boy that any one ever saw. Donald, the oldest of the trio, was one of those level-headed chaps who had a knack of doing the right thing at the right time. His judgment had been proven good in many a tight place and under many thrilling conditions. As a result, he was generally looked up to as a leader by the others, although it must be admitted that Adrian was also a lad of sense and plenty of nerve. Adrian was the owner of a large Wyoming ranch, and one of the books which has proved most interesting to American boys is known as The Broncho Rider Boys on the Wyoming Trail, a story of how Adrian saved his property from being taken away from him by a dishonest uncle.