Concerning names carved into stones at the junction of the Snake River with the Henry's Fork.

Materials created and collected by Cornell concerning H.S. (Smith) Munday (1812-1868), an early Middleton resident, and his son Perry (1846-1926). Perry operated a ferry on the Snake River at a site known as Walter's Ferry.

Two field notebooks and related papers. One notebook contains brief narrative accounts of field trips to areas around Boise, including the Payette and Snake River canyons. Robert Limbert was a participant on some of these expeditions.

Collection consists of one bound typescript report prepared for August George Liebmann by Walter Hovey Hill, civil enginer, with a supporting letter by A.J. Wiley, consulting hydraulic engineer. The Salmon-Snake River power project as proposed by Mr. Liebmann would construct a dam on the Salmon River and divert water through a tunnel to the Snake River for the production of hydropower.

Records relating primarily to the Minidoka and Payette-Boise Reclamation projects in Idaho, together with scattered items concerning Ira B. Perrine, Salmon River diversions, American Falls Reservoir, the Twin Falls North Side Project, and the Idaho Irrigation Company project.