A map of the county of Cornwall from the EXTREMELY RARE FIRST PHILIP LEA EDITION of 1689. Originally surveyed in 1576 this map of Cornwall remains a classic to this day. It was engraved by Lenaert Terwoort whose imprint is lower left, he was one of a number of Dutch engravers of the work and apart from the five maps he contributed and that he originated from Antwerp little is known of him. After the plates came into the hands of William Web they were acquired by an unknown person for an edition of c.1665 which did not come to fruition. Philip Lea who flourished 1683-1700 as a cartographer, globe and instrument maker and map seller acquired the plates at some point after this. His atlases were rarely uniform usually being made to order and his editions of Saxton’s atlas are similarly varying in content although built around his stock of the original plates.Only THREE KNOWN EXAMPLES of this c.1689 edition exist: Bodleian Library, British Library and the Royal Geographical Society. An examination of those examples helps to place a circa date of 1689 on this issue. The addition of roads on the maps post-dates them after John Ogilby’s ‘Britannia’ of 1675. The date 1689 is found on those of Somerset and Wiltshire and the Royal initials W.R. are found on the ‘Anglia’ replacing those of Charles II. William III reigned from 1689-1702. In this early state Lea placed reference letters to the upper and left side borders. This new introduction by Lea was placed on 16 of the maps in 1689 but he did not extend the idea to the balance of the maps for the later edition of 1693. Crosses were also added to the market towns in the county and most notably roads. The large Latin title cartouche upper left is replaced by a beautiful view of the capital entitled ‘Launceston or Ancient Dunhevet’ although retaining the royal arms ‘C. R.’ above. The English title is revised adding Lea’s name and removing the date. The arms of Thomas Seckford are replaced by those of 8 ‘Persons Dygnifyed wth ye title of Cornwall’. An interesting note below records ‘That euer since K: Edw: ye 3d The title of Duke of Cornwall belongeth to ye Kings eldest Sonne’. Evans & Lawrence (1979) pp. 50-3, 62 no. 25 & 158; Quixley (1966) no. 1; Shirley (2004) T.Sax 1g; Skelton (1970) no. 110; Worms & Baynton-Williams (2011).