D.B.Barton 'The Cornish Beam Engine', 1969, p.79: 'In 1903 ... South Condurrow with its four engines (Marshall's 60"; a 26" whim bought in 1881 for £220 from West Chivwerton; plus two sets of steam stamps) was bought by Grenville for £875 complete. The original intention ... had been to pump all the water by Fortescue's 90" (with 18" pumps), reserving Goold's 80" for winter use when necessary. In fact, however, all three engines were needed to keep the mines drained during wet winters ...'; p.83: lists engines remaining in west Cornwall in 1922(total 14, 2 working, 12 idle); includes: 'Grenville: 90" Fortescue's - idle; 80" Goold's - idle, scrapped about 1928; 60" Marshall's - idle, scrapped about 1923'.