Peter Jackson Peter Jackson Millhead Stream, Royal Gunpowder Mills, Waltham Abbey (c.1735)WatercolourPeter JacksonCopyright Peter Jackson / Royal Gunpowder Mills 2001 Gunpowder Mill, Royal Gunpowder Mills, Waltham Abbey (c.1735)WatercolourPeter JacksonCopyright Peter Jackson / Royal Gunpowder Mills 2001 Manage Cookie Preferences