Ordnance Survey of England and Wales : 1/4-inch to one mile [New Series].
Great Britain.Ordnance Survey.
Southampton : Ordnance Survey,
1926-30.
Relief shown by contours, gradient tints and spot heights.
2A: North central -- 4A: North Wales & Manchester -- 6A: North Midlands and Lincolnshire -- 7A: South Wales -- 8A: Midlands -- 9A: East Anglia