[ 82]U.S. patent 17389, dated May 26, 1857. The patent was not renewed when application was made in 1870, on the grounds that the original patent had been made co-terminal with the British patent. The latter had been abandoned "by Mushet's own fault" so that no right existed to an American renewal (U.S. Patent Office, Decision of Commissioner of Patents, dated September 19, 1870)
[ 83]See below, p. 45. The exact date of the purchase of Mushet's patent is not known
[ 84]Engineering, 1882, vol. 33, p. 114. The deal was completed in 1863
[ 85]The Engineer, 1864, vol. 18, pp. 405, 406
[ 86]Mining Journal, 1864, vol. 34, pp. 77 and 94 (italics supplied). It has not yet been possible to ascertain if this company was successful. Mushet writes from this time on from Cheltenham, where the company had its offices. Research continues in this interesting aspect of his career