Original sentence: He was the third son born to Philippa of Lancaster, the sister of [[King Henry IV of Enediterranean at that time were too slow and too heavy to make these voyages
Edited sentence: He was the third son born to Philippa of Lancaster, the sister of King Henry IV of England.Henry was 21 when he, his father and brothers conquered the Moorish port of Ceuta in northern Morocco, that had been for a long time the base for Barbary pirates that assaulted the Portuguese coast, depopulating villages by capturing their inhabitants to be sold in the African slave market.The desire to locate the source of the West African gold trade, find the legendary Christian kingdom of Prester John, and stop the pirate attacks on the Portuguese coast were three of his main interests in the region.The ships that sailed the Mediterranean at that time were too slow and too heavy to make these voyages.This attack was successful, as it inspired Henry to explore down the coast of Africa, most of which was unknown to Europeans