We next met our young friends in the second volume, "The Pony Rider Boys In Texas." It was on these south-western grazing plains that the lads took part in a big cattle drive across the state. This new taste of cowboy life furnished the boys with more excitement than they had ever dreamed could be crowded into so few weeks. It proved to be one long round of joyous life in the saddle, yet it was the sort of joy that is bound up in hard work. Tad's great work in saving a large part of the herd will still be fresh in the mind of the reader. How the lads won the liking of even the roughest cowboys was also stirringly told.

From Texas, as our readers know, the Pony Riders went north, and their next doings are interestingly chronicled in "The Pony Rider Boys In Montana." Here the boys had the great experience of going over the old Custer trail, and here it was that Tad and his companions became involved in a "war" between the sheep and the cattle men. How Tad and his chums soon found themselves almost in the position of the grist between the millstones will be instantly recalled. Tad's adventures with the Blackfeet Indians formed not the least interesting portion of the story. It was a rare picture of ranch and Indian life of the present day that our readers found in the third volume of this series.

Perhaps the strangest experiences, as most of our readers will agree, were those described in "The Pony Rider Boys In The Ozarks." In this wild part of the country the Pony Rider Boys had a medley of adventures—-they met with robbers, were lost in the great mountain forests, and unexpectedly became involved in an accident in a great mine. The final discovery of the strange secret of the mountains was the climax of that wonderful saddle journey.

From the wooded Ozarks to the stifling alkali deserts of Nevada was a long jump, but the lads made it. All of our readers remember the rousing description of adventures that were set forth in "The Pony Rider Boys In The Alkali." This trip through the grim desert with its scanty vegetation and scarcity of water proved to be a journey that fully demonstrated the enduring qualities of these sturdy young men. The life, far away from all connection with civilization, was one of constant privation and well-nigh innumerable perils. The meeting with the crazed hermit of this wild waste formed one of the most thrilling incidents. The whole vast alkali plain presented a maze the solving of which taxed to the utmost the ingenuity of the young men. However, they bore themselves with credit, and came out with a greater reputation than ever for judgment, courage and endurance.

Our next meeting with these lads, who were fast becoming veterans of the saddle, was in the sixth volume, "The Pony Rider Boys in New Mexico." Here, again, the lads ran upon Indian "signs" and experiences, not the least of which was their chance to be present at the weird fire dance of the Apaches. The race with the prairie fire, the wonderful discoveries made in the former homes of the cave-dwellers, and the defence of the lost treasure in the home of the ancient Pueblo Indians are all matters well remembered by our readers.

Now another journey, to the scene of one of Nature's greatest wonders, the Grand Canyon of the Colorado, was absorbing the thought of Tad Butler and his young friends.

"The question is, what'll we take with us?" asked Ned Rector.

"Yes, that's one of the things about which we wanted to talk with you," spoke up Walter Perkins. "You always think of things that none of the rest of us remembers."

"Oh, I don't know. You're all pretty good planners. In the first place, you know you want to travel light."

"We aren't likely to travel any other way," scoffed Chunky. "Whatever we do, though, let's not travel light on food. I can stand almost anything but food—-I mean without food—-I mean——-"