1587282 Holyhead Harbour Works, View of the Face of the Mountain after the Grand Blasting Operations, 16 January 1857, the Quantity of Quartz Rock displaced 120,000 Tons, by a Charge of 16,000 Pounds of Powder (engraving) by English School, (19th century); Private Collection; (add.info.: Holyhead Harbour Works, View of the Face of the Mountain after the Grand Blasting Operations, 16 January 1857, the Quantity of Quartz Rock displaced 120,000 Tons, by a Charge of 16,000 Pounds of Powder. Illustration for The Illustrated London News, 24 January 1857. English School (19th Century)); Look and Learn / Illustrated Papers Collection; English, out of copyright.