Northumberland 19nw, 6". Hartleyburn Common, 1901/1928.
Northumberland 19nw, 6". Hartleyburn Common, 1901/1928. Black outline and contours with blue geology. Includes part of Northumberland 91. In very good condition.
About the England Six Inch County Series (later edition)
These early 20th century geological maps are at 1:10,560 scale, based on county layout. Each sheet covers 2 x 3 miles in considerable detail.