under the Tropic of Capricorn and beyond. For the island called the Regio Pathalis has a well-known port where the Sun’s shadow falls southward, therefore the inhabitants always have the Sun to their North… I say therefore that the southern side of India extends to the Tropic of Capricorn near the region of Pathalis”. In discussing the habitability of lands under the Torrid Zone and Tropic of Capricorn, D'Ailly drew on the Opus Majus, written around the year 1267 English monk and scholar Roger Bacon. With regard to the Regio Patalis, Bacon said: “the southern frontier of India reaches the Tropic of Capricorn near the Region of Patale and the neighbouring lands which are washed by a great arm of the sea flowing from the Ocean”. Patala was on or just south of the Tropic of Cancer, not south of the Equator, but somehow Roger Bacon had confused the Tropic of Capricorn with the Tropic of Cancer under which, on the day of the summer solstice, shadows at Patala were cast southward. D’Ailly's Ymago Mundi served as the standard text book on cosmography during the 15th and early 16th centuries and so made widely current the view that there was a part of India, or of what was later called Indo-China, where the sun's shadow always fell southward at noon: this part was the Region of Patala. This theory found expression on Martin Behaim's globe of 1492, where India potalis is located south of the Equator on the Hoch India peninsula on the eastern side of the Sinus Magnus, the actual Indochina. This concept of the Region of Patala is shown as Patalie regiã in the world map included in La Salade, a textbook of the studies necessary for a prince written by Antoine de La Sale and published in 1444. Following Magellan’s circumnavigation voyage of 1519-1522, Johann Schoener identified South America with the extended India Superior (Indochina) peninsula, and so depicted it on his 1523 globe. He also split the Region of Patala (Regio Patalis) off from this peninsula and transferred it across the ocean to become a promontory of the Terra Australis. In this he was followed by Oronce Fine, whose mappemonde of 1531 shows the large REGIO PATALIS promontory on the continent of TERRA AVSTRALIS. The REGIO PATALIS is shown on the globe in an armillary clock made by of Lyon in 1560, in a fashion similar