Partner, Cowles-Perrine Organization, Los Angeles, CA, 1924- ; An article in the Southwest Builder and Contractor of 12/26/1924 stated: "Announcement is made by Paul R. Cowles and John P. Perrine of a co-partnership operating under the name Cowles-Perrine Orgnization [sic], with offices at 742 S Hill St, Los Angeles; telephone TUcker 6932. They will give an engineering and architectural service." (See Southwest Builder and Contractor, 12/26/1924, p. 52, col 1.)

Cowles was born in Ohio and died in Placer County, CA, at the age of 79; his mother's maiden name was Hill;