Note 5 — XXVI CONTRERAS, CHURUBUSCO August, 1847

According to a topographical officer (Washington Union, Nov. 3, 1847) the only route from San Agustín to Mexico of which the Americans knew when they reached the ground was the highway. This surprises one at first. But the turnpike beyond San Angel was a local road serving only a few farms, the small villages of San Gerónimo and Contreras, and a manufacturing establishment near Contreras. It seemed to be of no strategic significance, and was not likely to be heard of at a distance. The fortifications along the highway were largely developed after Scott turned toward San Agustín. Valencia’s movements were impromptu. Scott had an Englishman residing at Mexico in his pay, and we know that two persons brought data on Aug. 19 (Sen. 65; 30, 1, p. 162). Apparently Scott did his duty as to seeking information.