The First Battle In the Messenger Service Pursued by the Uhlans Catching a Spy The Loss of Their Machines in Battle The Capture and Escape LIST OF ILLUSTRATIONS Page 15 15 THE BOY VOLUNTEERS ON THE BELGIAN FRONT THE BOY VOLUNTEERS ON THE BELGIAN FRONT CHAPTER I AN INTERRUPTED JOURNEY AN INTERRUPTED JOURNEY "Give it more gas; more gas, Pierre; they are coming up the cross road!" exclaimed Ralph excitedly, as he leaned forward. Pierre the chauffeur looked straight ahead and nodded, as he answered: "Oui, oui!" Before he had gone a hundred feet farther the occupants of the machine heard something like a shot, and Pierre turned his head slightly. "Two kilometers more and we shall be in Belgium," he said. This information did not seem to appease the two boys in the tonneau. Of the two, Alfred was the more excited, but Ralph kept up a constant flow of talk as he leaned out and gazed across the valley along which the machine was now shooting with tremendous speed.