A section of the first Road Maps of Britain, surveyed and prepared by John Ogilby in 1675.These surveys were made with 'Wheel Dimensurator' and an early theodolite. In that way a fairly accurate route could be recorded, with gradients. Streams, bridges and fords were recorded. This was to set out the Post Roads. Having crossed the sands below Gulval with the actual coast to the North side of the 'road', the coaches go through Chyandour and up through Penzance, passing a road which continues North, and then on to the position of the Market House, where the road breaks off through Alverton. Just what is shown around St Mary's Church, I have not yet fathomed. The road continues onwards to Newlyn, past 'Laregon'. There are houses at Treveneth. The numbers on the map are distances from Charing Cross. The whole of this seafront has altered dramatically; This is an exploration of as much written record as I can find.