Debenham Sisters
Betty and Nancy Debenham, with their dog, Poncho, were keen motorcyclists. Nancy won a Gold Medal at Brooklands in 1926.
The Debenham Sisters
They also built ladies models, along with larger machines with V-twins of up to 1000cc, a few of which survive.
The Motor Cycle, January 12th, 1920.
Sources: Graces Guide, The Motor Cycle, classicbikehub.uk