History of Wigan   (Help with ancient and recent history.)

Institution of Mechanical Engineers visit in 1872.

The Members then proceeded to the Rosebridge Colliery of Mr. J. G. Morris, where they descended the shaft of 815 yards depth and 16 feet diameter, the deepest shaft at present in England. The time occupied by the cage in traversing this depth is not quite one minute, giving a mean speed of about 30 miles per hour in the shaft. The winding drum of 26 feet diameter and 40 tons weight is worked by a pair of horizontal engines with cylinders of 36 inches diameter and 6 feet stroke.