From Dines 1956
Luskey.-Reputed to be a copper mine, this is only a prospecting adit with entrance near and about 20' ft. above the level of the River Lynher, 5 furlongs S.E. of Trebartha Lemarne Mine(6” Cornwall 22 S.W.). The adit, as a crosscut S. 28° W., entered granite at 10 fms. and picked up the lode, coursing about E. 22° N. and underlying 10° S., at 17 ftms. The lode followed for 70' ftms. W. is a crack with red stained granite walls, with here and there a filling, up to 5 in. wide, of quartz and red haematite, occasional patches of chlorite with pyrite, and some copper stains. There are three shallow winzes in the floor of the level at 28 ftms., 47 ftms. and 87 ftms. from the adit entrance.