Walter Map (fl. 1160-1196, died c. 1208-1210) was a medieval writer. He claims Welsh origin and to be a man of the Welsh Marches ("marchio sum Walensibus"); details in his writings suggest that he came from Herefordshire. He studied at the University of Paris, apparently around 1160 when Gerard la Pucelle was teaching there. He had encountered Thomas Becket before 1162. Wikipedia
The definitive Wikipedia entry for Walter Map. Wikipedia is the biggest multilingual free-content encyclopedia on the Internet. en.wikipedia.org/wiki/Walter_Map
Vol. 1. From the Beginnings to the Cycles of Romance. The Cambridge History of English and American Literature: An Encyclopedia in Eighteen Volumes. 1907–21 www.bartleby.com/211/0918.html
In 1162 he was at the Court of England . Henry made him a clerk of his household, which implies that Map had received, or was was about to receive, Holy orders . After this the road to other preferments was open to him. www.newadvent.org/cathen/09635a.htm