California Topographical memoir and report of Captain T.J. Cram, on Territories of Oregon and Washington University of Wisconsin Milwaukee - American Geographical Society Library Digital Map Collection - Thomas J. Cram Maps 1804 births 1883 deaths American explorers of the Pacific American military personnel of the Mexican–American War American topographers Burials at Laurel Hill Cemetery (Philadelphia) Explorers of Central America Explorers of Oregon Explorers of Texas Explorers of Washington (state) People from Acworth, New Hampshire People of New Hampshire in the American Civil War People of pre-statehood Wisconsin Union Army colonels United States Army Corps of Engineers personnel United States Army Corps of Topographical Engineers United States Coast Survey personnel United States Military Academy alumni Upper Peninsula of Michigan