Royal Flying Corps cover from FPO h.4 August 3, 1916, 4th Corps HQ Givenchy, France. Censor #875 11 Squadron, RFC. Signature M.M.Sisley - Flt. Lt. Michael Millard Sisley. 11 Squadron was formed at Netheravon in Feb. 1916 & the unit received Vickers F.B.5's in July & took them to France on the 25th. This squadron was the first all fighter unit.