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    Re: Old maps
    From: George Huxtable
    Date: 2009 May 8, 15:47 +0100

    Marcel Tschudin was writing about the map by Turkish Admiral Piri Re'is,
    which has an accepted date of 1513, though I don't know on what basis that
    dating was made.
    
    Its most convincing feature (perhaps its only convincing feature) is the way
    it shows the bulge of Brazil. But if that date is correct, that coast had
    already been noted, around 1500, by Vespucci and Cabral, and the map could
    represent real knowledge of its time.
    
    It appears to be an authentic and interesting document, which has been
    considerably tarnished, through no fault of its own, by fantasies built upon
    it, by those such as Hapgood, the book from the 1960's referred to by Marcil
    Tschudin (which I haven't read), and by "1421- the year China discovered the
    world", a bag of hokum by Gavin Menzies, (which I have).
    
    Marcel mentions longitude. Vespucci tried to determine longitude (by an
    eclipse?), but got things hopelessly wrong, because predictions of the Moon
    weren't up to it. Longitudes had to be deduced from dead-reckoning of the
    number of Westerly days sailing. Latitudes should have been easy, though
    Columbus made a hash, even of those.
    
    George.
    
    contact George Huxtable, at  george@hux.me.uk
    or at +44 1865 820222 (from UK, 01865 820222)
    or at 1 Sandy Lane, Southmoor, Abingdon, Oxon OX13 5HX, UK.
    
    
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