Philips' Handy Atlas of the Counties of England
Three Parliamentary Divisions coloured, railways and towns, but only major roads and larger villages.
Scale correct at 10 miles = 30.5mm, or 8.4 miles/inch, ie 1:530,000.
The Handy Atlas was not published until 1873, but the railways are earlier - with a line from Bishops Stortford to Braintree (opened 1869) but no lines to or from Walthamstow (opened 1870 et seq).