Sentence:  On the coal being detached in the manner above described, a corve, tub, or basket, is then brought to the spot on a four-wheeled train, by a man and boy, technically called a " <WSD>dragsman</WSD> and foal," and when filled with the scattered fragments, it is dragged to the bottom of the shaft, hooked to the end of the rope, and drawn to the top in about three minutes. When the corbes are made of iron they are called tubs, and the labours of the dragsman and his assistant are then performed by horses. 
Meaning of the word marked with <WSD> tags:  One who moves the carts or sledges at a mine; a putter.