Keywords: The Islands of Madeira Porto Santo and Dezertas. Surveyed by Captain ATE Vidal RN in HMS Styx 1843.jpg The Islands of Madeira Porto Santo and Dezertas Surveyed by Captain ATE Vidal RN in HMS Styx 1843 Scale circa 1 150 000 Three views http //collections rmg co uk/collections/objects/543843 html Royal Museums Greenwich 1847 UKHO / Walker J C 1847 Files of Madeira uploaded by Darwinius 1847 maps Topographic maps of Madeira 19th-century maps of Madeira Maps of Porto Santo Madeira in the 1840s 1847 in Portugal Ilhas Desertas HMS Styx ship 1841 Maps in the National Maritime Museum London |