Plympton: grid reference SX572586

Including Mary Hutchings, the mines lie on the southwestern slope of Hemerdon Bal, about two miles northeast of Plympton. Mary Hutchings sett lay to the west working a single lode from Engine Shaft. Hemerdon Consols worked three lodes.

Production records report that for Mary Hutchings between 1866 and 1880 - 426 tons of black tin. Between 1873 and 1879 - 263 tons of arsenic. 188 tons of mispickel were raised between 1874-76. For Hemerdon Consols in 1855-56 23 tons of black tin were raised.