[51] See vol. i., p. 30.
[52] Lean's 'Historical Statement of Steam-Engines in Cornwall,' p. 7.
[53] 'Records of Mining,' by John Taylor, F.R.S., &c., part i., p. 155; published 1829.
[54] See vol. i., p. 95.
[55] Henry Clark's recollections in 1869.
[56] Working in the Valley smiths' shop, in Dolcoath Mine, in 1869.
[57] See vol. i., p. 25.
[58] See vol. i., p. 128.
[59] Stuart's 'History of the Steam-Engine,' published 1824.
[60] See Trevithick's letter, August 22nd, 1802, vol. i., p. 153.