The Timpitter's Mine
Christopher Wright
Hardcover
(Victory Press, March 15, 1966)
Tim and Peter (the Timpitters, for short) are very keen on caving. When they hear of a lost mine in Derbyshire, after collecting all the information they can trace, they set off in search of the mine. Strange tales are told them and Mad Sam gives them a warning, but nothing daunts their spirits and they venture forth into the unknown!