Helen Wallis
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Master mariner or dedicated amateur? Helen Wallis examines the state of geographical knowledge when Columbus set sail, and outlines his use of it. Published April 30 1992
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A new biography of the naval hero
Published January 1 1991
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Two hundred years before Captain Cook, Dieppe map makers placed the Portuguese flag on a large land-mass called Java-la-Grande approximately where Australia appears on today's atlas. Helen Wallis sifts through the cartographic evidence to examine the intriguing question. Published March 1 1988
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Helen Wallis charts the Portugal's astonishing success in voyages of exploration between 1415 and 1520 Published May 31 1986
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 John Kennedy’s commitment to put a man on the Moon in the 1960s is often quoted – most recently by Gordon Brown – as an inspired civic vision. Gerard DeGroot sees the reality somewhat differently. |
