John Stables was born in Ulverston, England, and followed his father and older brother to Winnipeg. At the beginning of World War II, he worked as a painter and sign writer for the shipbuilding industry. A couple of years later, he became an artist of Maple Leaf, the first Canadian publisher of comic books. After the creation of Vernon Miller's 'Iron Man', the company employed other artist to extend their line of superheroes. Under the penname Jon St. Ables, Stables created 'Brok Windsor', a fantasy strip set in the Canadian North. It debuted in the April-May 1944 issue of Better Comics. He was also the company's top cover artist. Stables and his wife opened a studio later on and produced a line of colouring books. The family moved to the USA in the 1950s, where Stables worked in the art department of Boeing until his retirement in 1975.