Sappers and Miners

This must be one of Manville Fenn's very best books. The suspense is totally gripping, right to the very end. The action takes place in Cornwall, in and around an old tin-mine, possibly dating back to Roman and Phoenician days, for these people obtained much of the tin they needed to make bronze, from Cornwall, and many of the mines are still there, with many miles of workings, often going out far beneath the sea.