Here are the details of maps for Portsmouth (East):
This detailed map of the Eastney and Milton area of Portsmouth is double-sided for maximum coverage.
The main map covers the area from Owen Street, Eastney, eastward to the Langstone Channel, and from Milton Farm southward to the coast. Features include Eastney Barracks, St Andrew's church, Coastguard Station, West Winner, rifle ranges, Port Royal Cottage, Highland Ward, St James church Milton, etc.
On the reverse we include a portion of adjacent sheet 84.05 extending coverage northward to include Lunatic Asylum, Warren Lane area, Baffins, Great Salterns.
The map links up with Hampshire Sheets 83.08 Central Portsmouth to the west and 83.12 Southsea to the south.
You might find this Index Map useful.