Before leaving the vicinity Cooke with a party of fifty reconnoitered the country above the town towards a village and church, where, it was supposed, the garrison and main body of the people had taken refuge. As the nature of the country, however, afforded excellent opportunities for ambush, if the Mexicans should choose to make resistance, the company of fifty returned. However the movement was not without its value since, according to Col. Cooke, and as was afterwards ascertained, it caused the Mexicans who had fled to the aforesaid village to still further retreat, and the reinforcements which had come from the presidios of Fronteras, Santa Cruz and Tubac, to return to their posts.[42:h] =Junction With Kearny's Trail.=--Renewing its journey the command in the course of three days, by hard marching, reached the Gila river and intersected the route followed by General Kearny, four hundred and seventy-four miles from the point at which they left it in the valley of the Rio Grande. The Southern Pacific Railroad traverses practically the route of the Battalion between these two points. Colonel Cooke made a map of this part of the Battalion's journey--published in his book, (see map fold) and referring to it, in connection with the Southern Pacific Railroad, he says: "A new administration, in which Southern interests prevailed, with the great problem of the practicability and best location of a Pacific Railroad under investigation, had the map of this wagon route before them with its continuance to the west, and perceived that it gave exactly the solution of its unknown element, that a southern route would avoid both the Rocky Mountains and Sierra Nevada, with their snows, and would meet no obstacle in this great interval. The new 'Gadsden Treaty' was the result; it was signed, December 30, 1853."[42:i] =The March Down the Gila.=--Following more or less the windings of the Gila, the way made difficult from alternating stretches of deep sand and miry clay, the command arrived at the junction of the Gila with the Colorado on the 8th of January. An attempt at the shipment of part of the command's provisions down the river on a flat boat proved a sad failure, and ended in considerable loss. The scheme was Col. Cooke's. The "boat" was constructed by placing two wagon beds end to end and lashing them to two dry cottonwood logs. On this improvised boat two thousand five hundred pounds of provision and corn were placed. At places the river spread out over sand bars with but three or four inches of water covering them; the boat was repeatedly lodged on these, and the precious stores of food had to be landed in several places. The most of it was never recovered, though repeated efforts were made to regain it.