Lisboa: Divisao de Publicacoes e Biblioteca. Agencia Geral das Colonias, 1939. Second edition (2.a Ediçao correcta e levemente aumentada). Hardcover. Contemporary full tan calf with morocco spine labels, original card wrappers bound in, octavo (6.5 x 9.5 inches), 532,  pp. Profusely illustrated with plates, maps and charts (many folding), text illustrations. Last leaf contains corrigenda. Moderate scuffing to covers, faint scattered foxing, else very good. Very good. Item #13757
A history of Portuguese voyages of discovery with a focus on navigational methods. Text in Portuguese.