Here are the details of maps for Portsmouth (North):
This detailed map covers the northern part of Portsmouth, with coverage stretching from Northern Parade southward to Washington Road and Winchester Road, and from the waterfront eastward to Copnor Road.
Features include tramways, Portsea Island General Cemetery, schools, St Mark's church, North End area, Stubbington Lodge, Oak Farm, Stamshaw area, eastern edge of Whale Island, Corps Christi RC church, Little Gatcombe Farm, Manor Farm. On the reverse we include street directory entries for Drayton Road, Elm Road, Havant Road, London Avenue, Powerscourt Road, Stamshaw Road, Twyford Avenue.
The map links up with Hampshire Sheets 75.16 Hilsea to the north, 83.08 Central Portsmouth to the south.
You might find this Index Map useful.