Gardner, G. Clinton (George Clinton) 1834-1904 creator mixed material monographic eng 20 Letters written to family members in Washington, D.C., by Gardner as a member of the United States and Mexican Boundary Survey surveying the Mexican boundary, 1849-1852, and Northwest Boundary Commission surveying the northwest Canadian boundary, 1858-1859. Open to research. Civil engineer and railroad executive. Collection material in English. Gardner family Correspondence Northwest Boundary Commission, 1857-1869. United States and Mexican Boundary Survey. Northwest boundary of the United States Canada Boundaries United States Mexico Boundaries United States United States Boundaries Canada United States Boundaries Mexico Civil engineers Executives mm 98006407 Open to research. DLC 981027 20260227111727.0 mm 98006407