LeRoy Adams Grumbine (1862-1953) attended Oberlin College intermittently as a special student in the Oberlin Academy, the Oberlin Conservatory of Music, and the College of Arts and Sciences (1898-1907). Born June 21, 1862 in Frekericksburn, Letanon County, Pensylvania, he was the son of Roie Adams Grumbine (d. 1935) and her husband (b. August 25, 1848). The family moved to Oberlin OH (n.d.), and resided at 218 Forest Street for nearly 25 years. His mother taught private piano lessons from this residence until her death in 1938.

LeRoy Grumbine's career focused on architectural design. His practice furnished architects and landscape architects with models of their designs of proposed buildings and layouts for presentation purposes, including perspectives in water color, pen, pencil, and ink. Grumbine began his architectural design business in Cleveland, Ohio, then he moved his firm to Los Angeles, California in 1928. In the same year, he married Ruth Banks Colburn.

Military service interrupted his post-college years in 1917-18 and included a tour of duty in France and Germany at the height of the first World War. LeRoy Grumbine died July 15, 1953 in Los Angeles California. No surviving family was mentioned in his papers.