"We must make the trial," said Dick, mounting his restive steed. "Come, lead the way. Do not spare the horses now," and with the Indian in advance they were soon clattering down the hill at breakneck speed. On reaching the road the Indian, bending low in the saddle, for the first time touched his horse with the spur, and the splendid animal responded to the unaccustomed punishment as if shot from a catapult. Side by side the two sped along the roadway towards their distant goal. Again the rails and track ran parallel and Tomas, taking advantage of his knowledge of short cuts, turned from the highway and led the chase along the narrow trail beside the tracks, never once stopping the fearful speed of his mount. Suddenly from behind them came the long wailing whistle of a locomotive. Glancing over his shoulder Dick saw a few hundred yards behind a fast approaching train. This could not be the troop train, he was sure. Once more he heard the whistle warning him to get clear of the track. "Tomas," he called, but the Indian gave no sign of having heard his cry. Another look behind showed the train rushing on with no slackening of speed. Still Tomas continued in his mad flight. Dick tried to swerve his horse from the trail beside the track, fearing that when the train overtook them the animal might become frightened and dash against the side of the train; but now the black horse was infected with the fighting spirit, and so long as the bay horse in the lead was ahead just so long would he keep up the heart-breaking run. Dick could feel the powerful muscles beneath him working with the smoothness of well-oiled machinery, and in spite of the enormous strides with which they covered the ground, he hardly rose from his saddle, so perfect was the action. Then to Dick came a new thought. Unless the train ahead was delayed he never could hope to reach the danger point in time to warn the troops. He knew his attempt was futile, so why continue! This train now thundering along so close behind might catch up with and stop the artillery train. But how could he let those on board know of the danger? To attempt to flag the train was useless now. Had he thought of it before it might have been possible, but it was not very likely, under the most favorable conditions, that they would stop on the signal of two lone and unrecognized horsemen alongside the track. Should he attempt to interfere with its progress, the chances were that the train guard--men from his own corps, possibly his own company, would shoot him as a suspiciously acting native: "shoot first and inquire after," was a fundamental principle in these treacherous revolutionists.