Note 24 — THE LEARDO MAP OF THE WORLD 1452 OR 1453

See Kret., Port., pp. 81-93; see also E. L. Stevenson, Portolan Charts: Their Origin and Characteristics, with a Descriptive List of those Belonging to the Hispanic Society of America, New York, 1911, p. 19, where it is suggested that the faulty orientation of the Mediterranean may be in part connected with the persistence since the time of Ptolemy of the practice of placing Constantinople on maps “too far to the north by at least two degrees.”