Imperial Gazetteer of England & Wales
Estuary of the Thames and the Medway. Shows more of Kent than of Essex.
Displayed scale of 2 miles = 22.3mm, or 2.3 miles/inch, ie 1:145,000.
It's hard to tell railways from roads, but there is a line out to Southend (opened 1856) but not to Shoeburyness (opened 1884).