Have added a page in the Roll of Honour, ‘Site Memorial’ section for Frederick:-
http://www.roll-of-honour.org.uk/r/html/rowland-frederick-william.htm
Information
KEW:- WO 361/2172, WO 361/1955, WO 361/2196, WO 392/26, WO 345/45, WO 361/1616, WO 361/2063, WO 361/2169, WO 361/1987, WO 361/2160, WO 361/2187,