Cavities three miles long, at Oxen-le-Field, Durham. A, B, C communicate with each other, diameter, about 38 yards. The diameter of D, a separate cave, is about 28 yards.
A is 19 feet 6 inches in depth.
B is 14 feet in depth.
C is 17 feet in depth.
D is 5 feet 6 inches in depth. (See Notes and Queries, August 21, 1875.)