Edinburgh Castle website Historic Environment Scotland. "Edinburgh Castle (SM90130)". Scottish National War Memorial website Edinburgh Castle, Royal Commission on the Ancient and Historical Monuments of Scotland "Canmore" database Images of Edinburgh Castle from the Royal Commission on the Ancient and Historical Monuments of Scotland Engraving of view of the North East view of Edinburgh Castle in 1693 by John Slezer at National Library of Scotland Time-Gun Map of Edinburgh & Leith 1861 at edinphoto