John Seller Essex Map 1783. Map Maker/Cartographer - John Seller. Towns shown on the map of Essex being - Chelmsford, Colchester, Harwich, Halstead, Great Dunmow, Rochford, Brentwood, Billericay, Basildon, Canvey Island, Epping, Manningtree, Maldon, Rayleigh, Thaxted, Southend-on-Sea, Waltham Abbey, Walton-on-the-Naze. Description – This particular John Seller Essex map being published in The Antiquities of England & Wales by [continue reading]