From a large collection of glass stereoviews that belonged to Dr William Gardiner Anglin (1856 - 1934) who lectured at Queens University in Kingston, Ont.
The Cádiz Memorial, also known as the "Prince Regent's Bomb" located in Horse Guards Parade in London.
It is a French siege mortar used by the French in the siege of Cadiz and captured by Wellington at the battle of Salamanca in 1812