These detailed maps maps normally cover an area of about one and a half miles by one mile. Each map includes an introduction. The London maps link up with those for Middlesex to form a major series for the Greater London area.

There are three versions of this map, showing how the area developed across the years. The maps each cover the same area, covering most of Hampstead Village and much of Hampstead Heath. Coverage extends from Finchley Road and Platts Lane eastward to Parliament Hill Road, and from Leg of Mutton Pond southward to Arkwright Road. Features include Hampstead High Street, Christ Church, Workhouse, Rosslyn Hill, Rosslyn Park, Hampstead Heath station, North Western Fever Hospital, Hampstead Ponds, East Heath, West Heath, Frognal Park, Westfield College, tramway to South End Green and depot, Fitzjohns Avenue, Vale of Health, West End. The 1915 map has a good selection of street directories. The 1866 map has an extract from an Old Series Inch to the Mile map for the area.

The map links up with London Sheets 18 Kenwood to the north, 26 Cricklewood to the west, 28 Gospel Oak to the east, 37 Swiss Cottage to the south.