[HETON, Thomas] Some Account of Mines, and the advantages of them to this kingdom. With an appendix relating to the mine-adventure in Wales, London: John Wyat, 1721. 8° (185 x 115mm.). (Some browning). Contemporary speckled calf. (Rubbed, upper hinges cracked but holding). Provenance: Mr. Poole (inscription on front free endpaper); John Salder (inscription on title). Goldsmiths' 5924; Hoover 419.