"Interested in wind and watermills from an early age Jon was further stimulated into a serious study after attending a lecture by Rex Wailes. Following a motor vehicle apprenticeship in Coventry he was joint instigator in saving Wrawby Post Mill from demolition in 1960. He served as Honourary Secretary and later Chairman of the Wrawby Windmill Society. He was technical advisor to the Lincoln Civic Trust in their sponsored restoration of Ellis's Mill Lincoln. He was then offered the opportunity to turn a hobby into a career through Rex Wailes connections and took the position of miller/millwright at Flowerdew Hundred Plantation, Virginia, USA to commission and operate the post mill built to commemorate the earliest known windmill site in British North America.

Since returning to England he has served on the Committee of the Society for the Protection of Ancient Buildings Mills Section, Lincolnshire Mills Group and Industrial Archaeology Group.

Jon lives in Lincolnshire Wolds and is married with two sons and a daughter." - from "Windmills of Lincolnshire" (2012) by Jon Sass.

Donald W Muggeridge was one of the pioneer mill researchers of the 1930s. A Kentish Man, he was born in the early 20th century and inherited his father's (William Burrell Muggeridge) interest in windmills. Donald was married to Vera in 1936. He volunteered the month after WWII broke out and escaped from the Dunkirk beaches without injury. In 1943 he returned to Kent for officer training, and in the same year his only son, Derek, was born. In the final phase of the war, with an armoured division travelling from Normandy to Berlin, Donald still managed to take more than 400 photographs of mills. On a March 1945 letter to Rex Wailes, Donald, a Lieutenant, put his army details "502 Coy RASC (Indep. Armd. Gde) BLA" at the top. In 1956 Donald and Vera moved to Canada, and later to California, where he retired in 1983. He died in 2015.