David John McCosh was born in Cedar Rapids, Iowa in 1903. After earning undergraduate and graduate degrees at the Art Institute of Chicago, and working and exhibiting in Iowa, Illinois, and New York in the early 1930s, McCosh relocated to Eugene, Oregon for a faculty position at the University of Oregon. From 1934 to 1970, he taught courses in lithography, drawing, oil painting, and watercolors, and influenced a generation of art students at the UO, including gallery owner Karin Clarke's parents, Mark Clarke (1935--2016) and Margaret Coe.