Northumberland nXCVII.NE (6 inch to the mile) - Northumberland nXCVII.NE (6 inch to the mile)
OS revised: 1920, Geological Survey resurveyed: 1924 to 1925, Published: 1930 Size: map 31 x 46 cm (ca. 12 x 18 inches), on sheet ca. 47 x 67 cm (ca. 18 x 26 inches)