It was late night—past eleven—when the coach broke down on a stretch of rocky road between high mountains. I stopped to get my blankets; and when I started on again, the _compañeros_ had long vanished down the winding road. Somewhere near, I knew, was La Cadena. At any minute now a sentinel might start up out of the chaparral. For about a mile I descended a steep road that was often the dried bed of a river, winding down between high mountains. It was a black night, without stars, and bitter cold. Finally, the mountains opened into a vast plain, and across that I could faintly see the tremendous range of the Cadena, and the pass that the Tropa was to guard. Barely three leagues beyond that pass lay Mapimi, held by twelve hundred Federals. But the hacienda was still hidden by a roll of the desert. I was quite upon it, without being challenged, before I saw it, an indistinct white square of buildings on the other side of a deep arroyo. And still no sentinel. "That’s funny," I said to myself. "They don’t keep very good watch here." I plunged down into the arroyo, and climbed up the other side. In one of the great rooms of the Casa Grande were lights and music. Peering through, I saw the indefatigable Sabas whirling in the mazes of the _jota_, and Isidro Amayo, and José Valiente. A _baile_! Just then a man with a gun lounged out of the lighted doorway. "Quien vive?" he shouted, lazily. "Madero!" I shouted. "May he live!" returned the sentinel, and went back to the _baile_.... *CHAPTER VII* *AN OUTPOST OF THE REVOLUTION* There were a hundred and fifty of us stationed at La Cadena, the advance guard of all the Maderista army to the West. Our business was to guard a pass, the Puerta de la Cadena; but the troops were quartered at the hacienda, ten miles away. It stood upon a little plateau, a deep arroyo on one side, at the bottom of which a sunken river came to the surface for perhaps a hundred yards, and vanished again. As far as the eye could reach up and down the broad valley was the fiercest kind of desert,—dried creek-beds, and a thicket of chaparral, cactus and sword plant.