First Published in 2005. This book looks at the commercial relations between England and Portugal during the mediaeval period, including merchant trading. Due to the relations between Prince Henry the Navigator, and Vasco da Gama, the Anglo - Portuguese alliance, of which the origins can be traced back to the time of the crusades, and which lasted practically during the whole mediaeval period, is almost unique in the history of the Middle Ages for the care with which it was maintained, for its popularity in both countries, and for its beneficial results to both parties.