[41] See Trevithick's account-book, vol. i., p. 90.

[42] Captain John Vivian's recollections, vol. i., p. 142.

[43] See vol. i., p. 336.

[44] See chap. xxi.

[45] Vol. ii., p. 37.

[46] Vol. i., p. 5.

[47] Borlase's 'Natural History of Cornwall.'

[48] See drawing, vol. i., p. 25.

[49] See Pryce's 'Mineralogia Cornubiensis,' published 1778. Appendix.

[50] Smiles' 'Lives of Boulton and Watt.'