The Sea Fathers: A Series Of Lives Of Great Navigators Of Former Times is a book written by Clements R. Markham. It is a collection of biographies of some of the most renowned navigators of the past who were instrumental in exploring and mapping the seas. The book is divided into several chapters, each focusing on a different navigator, including Pytheas, the Greek explorer who sailed to the Arctic Circle in the 4th century BC, and Prince Henry the...