"Newfield Colliery, which has been working since about 1840, is being worked by Messrs. Bolckow, Vaughan, & Co. The "Busty" seam, 4 ft. 6 in. thick, is principally worked at a depth of nine fathoms ; it is reached by a shaft. The "Beaumont," 2 ft. 10 in., and the "Harvey," 2 ft. 9 in., are worked by drifts from the Busty. The output, which amounts to 500 tons per day, is converted into coke, and used at the company's works. There are also large fire brick works, supplied with clay underlying the Beaumont Seam. The number of men and boys employed is about 600."

- Whellan's 1894 Directory of County Durham (via Durham Mining Museum)