John K. Hillers, American, b. Germany, 1843-1925 John Hillers (born in Hanover) was hired as a oarsman on John Wesley Powell's exploratory survey of the Colorado River in 1871. Learning photography from the expedition's photographer, James Fennemore, Hillers took over the position when Fennemore left the expedition in 1872 due to ill health. He is best known for his ethnographic images made in