"The last deep mine to be worked in Heddon was the Margaret Pit. It was situated about one kilometre to the south-east of the village, in the valley bottom. This was originally owned and on the property of the family of Cadwallader J Bates. It supplied coal to the village and also coal and clay to the 'Heddon Colliery and Fire Brick Works' located on Newcastle's Quayside. The Margaret Pit was both a deep mine and a drift mine, with drift workings going back into the hillside. In 1855, Barras & Co. were firebrick manufacturers at Heddon Brick Works, managed by John Brown (Whellan 1855) , Fenwick Charlton was the Pit Engineer in 1886, and a man called, Heddon Robert, a brick maker at the local brick works."

- http://heddonhistory.weebly.com/coal-mining.html