Cover franked with 1957 20c sepia 'Galapagos' issue (SG 1) and 1955 80c crimson and 1960 2s brown 'National' issues (SG 1049a & 1175) tied by two strikes of boxed POST OFFICE GALAPGOS 'Barrel Mail' cancel in black. Sent airmail to USA with large boxed 'COME AND SEE THE ENCHANTED ISLANDS GALAPAGOS - ECUADOR' Tortoise cachet in black on reverse.