"Tomas is an old servant in my household, Señor. He will accompany you and be under your orders. This paper will pass you through any of the Federal lines. Again, Señor, I wish you luck. Adios!" Less than five minutes later Dick, mounted on the powerful black horse and followed by Tomas Casanave, a full-blooded Indian, was swinging along beside the railroad on a path which his guide informed him would save nearly a kilometer at the start. At the first pond of water they came to, Dick ordered a halt. Dismounting and ordering Tomas to do likewise, he gathered up a quantity of mud and began smearing it over the velvety coat of the animal he rode, over his clothes and shoes, even putting some on his face. "And why does the Señor do this?" asked Tomas, looking on in amazement at the proceeding. "The Colonel told me his horses are known from here to Managua by every rebel along the line, but they are well known because they are always so well groomed, for one thing." "I care for the Colonel’s horses, Señor," said Tomas, simply, but with much pride in his voice. "By spreading this mud over the horses," continued Dick, "it may help deceive persons whom we meet. Now, Tomas, turn those saddle cloths, smear mud on the trappings and harness, and tie your coat in a roll back of your saddle. Also hide your carbine and its boot where you will be able to find it on your return, and last, but by no means least, remove that blue band from your sombrero." Tomas followed Dick’s advice, and by the time he had finished no one would suspect either of them of belonging to any military organization. In fact the Tramps’ Union, if there be one, would have disowned them. "In case we are held up you are to answer all questions. I will tie this handkerchief about my neck, and you may state I am ill and we are hurrying to Managua to consult a doctor about my throat, which pains me and prevents me from speaking. Now, Tomas, we have lost time enough. You take the lead and I will follow. Save every minute, but also remember these horses must carry us to the end of the journey." Springing into the saddle they instantly broke into the long lope which was to be their gait for the coming hours. When told of the task before him by Colonel Diaz, Tomas had been anything but pleased at the prospect. He knew the danger of running the gauntlet of rebel bands infesting the country between La Paz and the capital city, and he was filled with apprehension. Dick’s preparations won his admiration, and the boy’s knowledge of Spanish was another agreeable surprise. He began to believe they might win through, rebels or not. That the foreigners, who had a half hour’s start, were following the same road, was soon discovered by the Indian. Accustomed to reading signs of the trail he interpreted them for Dick’s benefit. Once he dismounted just before crossing a small stream which trailed across the road and carefully examined the ground on the far side near the water’s edge.