The Byrnes family moved to Whonnock when Brian was one year old. As an adult he owned Byrnes Garage on the Lougheed Highway at 272nd Street. He and his wife, Isabel, lived in a nearby home on River Road. They shared an abiding interest in local archaeology, becoming members of the Archaeological Society of B.C. They participated in many explorations and digs, becoming experts on locations of earlier native settlements and tools.
Margaret Isabel Byrnes (nee Ferguson) was born in 1913 to parents Hector and Ruth Ferguson (nee Rolley) in Port Haney.
Growing up near the mouth of Kanaka Creek, she collected arrowheads along the banks of the creek, developing a keen eye to distinguish worked stone from pebbles, and a lifelong fascination with the lives of First Nations tool makers.
Isabel became a primary school teacher, working at South Lillooet School in 1931 and then Whonnock School until her marriage to Brian Byrnes in 1939, when she resigned. At that time, it was the common practice for married women. The wartime teacher shortage saw her called back into service in 1943, and she continued to teach until her retirement in 1965.