The corral at Arivaca was constructed of adobes, with a layer of cactus poles (ocquitillo) lengthwise between each layer of adobes. The Apaches tried their rope saw, but the cactus parted the rope. The bars were up, and a log chain wound around each bar and locked to the post; but they removed the bars quietly by wrapping their scrapes around the chain, to prevent the noise alarming the watchman. The steam engine was running day and night, and the watchman had orders to go the rounds of the place every hour during the night; but the Apaches were so skillful and secretive in their movements that not the least intimation of their presence on the place was observed,--not even by the watchdogs, which generally have a keen scent for Indians. At the break of day the Apaches gave a whoop, and disappeared with the entire herd before the astonished gaze of five watchmen, who were sleeping under a porch within thirty yards. A pursuit was organized as soon as possible; but the pursuers soon ran into an ambuscade prepared by the retreating Apaches, when three were killed and two wounded. The rest returned without recovering any of the stock. This loss of stock made very lonesome times at Arivaca, as it could not be replaced in the country, and we had no animals to haul ores, fuel, or provisions; only a few riding and ambulance animals, which had to be kept in stables and fed on grain. About the same time the Apaches made an attack on the Santa Rita Mining Hacienda, and the eastern side of the Santa Cruz River had to be abandoned. At Tubac, the headquarters of the company, where the old Mexican cuartel furnished ample room for storage, about a hundred and fifty thousand dollars worth of merchandise, machinery and supplies were stored. The Apaches, to the number of nearly a hundred, surrounded the town and compelled its evacuation. The plunder and destruction of property was complete. We had scarcely a safe place to sleep, and nothing to sleep on but the ground. The women and children were escorted to the old pueblo of Tucson, where the few people remaining in the Territory were concentrated; and they remained there in a miserable condition until the troops arrived from California under General James A. Carlton, United States Army, commonly called "Carlton's Column." General Carlton, upon arriving in the Territory, issued an order declaring martial law between the Colorado and the Rio Grande. These troops garrisoned the country between the rivers, and drove out the rebel troops, who had come in from Texas under the Confederate government.