Relief shown by hachures and spot heights. Forest, marsh, and volcanic field areas shown graphically. Author's routes shown in red. Includes inset map of Madgascar [scale ca. 1:12,940,000 at 15° S], showing area of primary map. From: Journal of the Royal Geographical Society of London. Vol. 45 (1875), pp. 128-52; held in Firestone Library. Call number: G7 .J687