He is the designer of the 1759 game A Journey Through Europe, which was based upon Game of the Goose. The game is inscribed "Invented and sold by the Proprietor, John Jefferys, at his house in Chapel Street, near the Broad Way, Westmr.
John Jefferys, creator of A Journey Through Europe (1759), a game inspired by Game of the Goose, is noted as its inventor and seller at his residence on Chapel Street near Broad Way in Westminster.