sentences:  This was originally worked on the surface then by shallow shafts, and later by deeper shafts with waterwheels or steam engines operating pumps and winding gear.In the later 18th century, the Warrens of Poynton co-operated with the Leghs of Lyme to work the Cannel and Sheepwash seams at Norbury Hollow.Output in 1789 was over 23,586 tonnes (26,000 tons) rising to a peak production of 221,056 tonnes (243,673 tons) in 1859.