Here are the details of maps for Becontree:
This detailed map shows what was still a very rural scene between Ilford and Romford. Vallance House (here spelt Vallance) is at the centre of the map and the area would change when the LCC bought the manor for building development in 1921. This map is therefore fascinating for showing the area before this major development. Green Lane crosses the map west-east, Bennett's Castle Lane runs north-south, and Wood Lane runs between them. The only significant development is at the NE corner where we have Beacontree (or Becontree) Heath, with a few houses around the heath.
The map links up with Essex Sheet 79.09 Chadwell Heath to the north, 78.16 Goodmayes to the west, 79.14 Rush Green to the east and 87.01 Parsloes to the south.