As well as being the first man down, Chapman was one of the two longest lived survivors. On the fiftieth anniversary of the disaster, he was interviewed by Mr T Mason and his recollections formed the basis of Mason & Atkinson (1911). Mason, T.; Atkinson, Peter (1911), "The Hartley Pit Disaster", The Science and Art of Mining, Durham Mining Museum, retrieved 3 October 2013
the largest pumping engine in the North of England.[2] According to Gardiner & Smith 2001 it could raise 1,500 imperial gallons (6,800 L; 1,800 US gal) per minute; this is a good match to the pump dimensions (24 inches (610 mm) diameter bore,9.25 feet (2.82 m) stroke) and maximum stroke rate (8 to 8.5 per minute) stated at the inquest;[4]The Illustrated London News 1862, p. 107 claimed a 400 horsepower (300 kW) engine lifting 180 tons of water per stroke and making five to six strokes per minute (equivalent to over 40,000 hp; presumably 180 imperial gallons (820 L; 220 US gal) per stroke was intended) Gardiner, Jeff; Smith, Mark (2001), The Hartley Colliery Disaster Medal, National Mining Memorabilia Association The Illustrated London News (1862), The Hartley Pit Disaster, The Illustrated London News
the largest pumping engine in the North of England.[2] According to Gardiner & Smith 2001 it could raise 1,500 imperial gallons (6,800 L; 1,800 US gal) per minute; this is a good match to the pump dimensions (24 inches (610 mm) diameter bore,9.25 feet (2.82 m) stroke) and maximum stroke rate (8 to 8.5 per minute) stated at the inquest;[4]The Illustrated London News 1862, p. 107 claimed a 400 horsepower (300 kW) engine lifting 180 tons of water per stroke and making five to six strokes per minute (equivalent to over 40,000 hp; presumably 180 imperial gallons (820 L; 220 US gal) per stroke was intended) Gardiner, Jeff; Smith, Mark (2001), The Hartley Colliery Disaster Medal, National Mining Memorabilia Association The Illustrated London News (1862), The Hartley Pit Disaster, The Illustrated London News
