Either Trost & Trost, Trost & Rust, or Henry C. Trost independently drew 2 plans for an office building to be erected for the Detroit Copper Company in Morenci, Arizona. The plans are displayed in the 1907 Trost & Trost advertising booklet available for view at the University of North Texas (Denton) digital archives, linked to below. Searches of the Arizona Memory Project’s extensive database of period Morenci photographs (see https://azmemory.azlibrary.gov/digital/collection/histphotos/search/searchterm/Morenci/page/1) and other sources do not show any similarly designed structures. Additionally, the 1907 Trost booklet shows the drawings and not the actual buildings; therefore we believe this office structure was not built from the Trost plans, if built at all.

Screenshot of one of the Trost drawings is courtesy of https://texashistory.unt.edu/ark:/67531/metapth875477/m1/30/

— Mark Stone