The Fred T. Darvill photograph collection consists of images and slides documenting a trip down Glen Canyon in 1959. The trip was led by Jack Brennan and Don Harris of Harris-Brennan Expeditions. The main purpose of the trip was to hike to Rainbow Bridge.
The Mary Armstrong Milligan photograph collection consists of slides and photographs of the River Guides in Glen Canyon during the 1950s and 1960s. Mary A. Milligan was part of the crew on several SOCOTWA river trips in the late 1950s and early 1960s. SOCOTWA was an organization founded in the South Cottonwood Ward, Salt Lake County, that organized recreational and educational field trips for LDS groups, Boy Scouts, etc., for many decades.