|  |  |  | Woodhorn Colliery: UndercutterThe job of the undercutter, or hewer, was to dig coal from the bottom of the seam to make a gap between it and the 
rock below. This gap was filled with coal brought down by explosives.
 The hewers were paid so much for every ton of coal they extracted. The more difficult the coal was to mine, the more 
they got paid. This system was called cavilling.
 
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