Figure 1. Members of the 1890s border mapping expedition adjust one of the obelisks that marked the international divide. The wheel ruts in the soft sand presage the massive transportation infrastructure that would eventually be built in the borderland. International Boundary & Water Commission, United States & Mexico.

(Report of the Boundary Commission upon the survey and re-marking of the boundary between the United States and Mexico west of the Rio Grande, 1891–1896, album. Washington, DC: UNT Digital Library.)