Paper titled Origins of the English Art of Navigation in the Age of Drake, read at the first Reuniao da Historia da Nautica, held at the University of Coimbra, Portugal, in October 1968, revised in 1974. Typed copy with annotations and pasted-in sections from published copy, with a published and annotated copy from a Portuguese publication, the old title having been crossed out by hand and replaced by the new title, containing many inserts and manuscript annotations.