Stampless cover with manuscript 'On active service, Stamps unobtainable' at top with FIELD POST OFFICE 35 BRITISH ARMY S. AFRICA cds dated MY 14 1900 on front located between Thabanchu and Senekal in the Orange River Colony. Addressed to 'A Binns Esq. Government Land Department, George Town, British Guiana with NEW AMSTERDAM and GEORGETOWN transit & arrival cds's on reverse. A rare cover as only a small amount of troops from British Guiana fought in the British West Indies Regiment in the 2nd Boer War.