Burma. (River Boat Mail). 1941. Envelope addressed to Ireland bearing Burma SG 25, 2a 6p claret tied by 'R-18/IN/Set-3' double ring '4th Jan 41' routed via Rangoon with 'Opened by Censor' label and triangular 'Passed Censor/Rangoon/ 10' in violet on face. Lovely item of Travelling Post Office mail used on the Bhamo to Katha Irrawaddy River Steamer. Scarce item only seen on a few covers.