Stampless cover with large 'Governo Militar Provisorio do Acre Franquia de Correspondencia' ARMS cachet on front with ADM DO CORREIOS (AMAZONAS) cds dated 10 JAN 1904 on reverse. Addressed to a Doctor in MARANHAO with RECEP DE MALAS (MARANHAO) arrival cds dated 28 JAN on reverse. A scarcer civilian letter using the Acre frank. Mail from this campaign is exceptionally rare. Ex Moorhouse.