Rare thematic road map of the British Isles, published by Thomas and John Bowles.
The map focuses on the distance between the towns and market towns along the major roads of England, with all roads leading ultimately to London.
The inclusion of "sea road" is a fascinating feature. From Holy Head (Anglesey), a road leads to Dublin. East Anglia shows roads to Holland, while Kent has a road to Calais.
The map is quite scarce on the market.