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Drake's Circumnavigation of the Globe: A review: The Fifteenth Harte Lecture delivered at Exeter University 14th November 1980 (1981)
Set fair for Roanoke: Voyages and colonies, 1584-1606. (1985)
Sir Francis Drake as seen by his contemporaries: an essay (1996)
Raleigh and the British Empire (1947)
Sir Humphrey Gilbert and Newfoundland: on the 400th anniversary (1983)
Sebastian Cabot and Bristol exploration (1968)
The lost colonists and their probable fate (1984)
Sebastian Cabot and Bristol exploration (1993)
Drake's circumnavigation of the globe: a review (1981)