Slain ages 21 to the 21st regarding July 1944 Son out-of Louisa Ann Barson, out-of Ilford, Essex John Edward Gilbertson, RNZAF NZ41894 – Pilot. Martin John Byrne, RNZAF NZ404529 – Observer. Ronald Patrick Callaghan, RNZAF NZ411739 – Wireless User....