One end of General Roy's precisely measured base line on the Heath was a couple of hundred yards from my school, marked by a upturned cannon, now located in a street called Roy Grove. But back to the point - on 1 June 1943 Hounslow' s parish church was destroyed by fire (not the Luftwaffe but two local juvenile arsonists). The boys responsible had previously burned Hounslow' s Baptist church and the parish church at Isleworth, and were subsequently apprehended, with twelve boxes of matches and the contents of the rifled collection box, at St Edmund' s Catholic church in Whitton, Twickenham.