Sierra Leone. (Burma). 1922. Envelope written from the 'West African Frontier Force' addressed to '1st Staffordshire Regiment, Maymyo, Burma' bearing Sierra Leone SG 131, 1/2d green (pair) and SG 113, 1d carmine tied by Freetown/ Sierra Leone date stamp 'No 4 22' with 'Train Late/ Dely/ Maymyo Alexandra Barracks' double ring on reverse '21st Dec 22'. The only known example of this Burma Railway postmark from the British Military Barracks.