 After returning from his service in World War I , Frise began courting Ruth Elizabeth Gate , who had been born in the US and grew up in Toronto . She worked at an advertising agency , and co @-@ published with her father a magazine in braille and a braille bible . She married Frise on 21 February 1918 and the couple had four daughters , Jean , Ruth , Edythe , and Betty ; and a son , John . Frise often featured his spaniel Rusty in his strips . 
