Piers note: No. 207. Fort Clarence: West Ditch and Gun Casements of Lower Battery. Fort Clarence: Casemate Battery for 9-inch (12-ton) R.M.L. Guns, in Counterscarp of West Ditch. Looking Northwest.
Date.: ca. 1878
Reference: Royal Engineers Nova Scotia Archives number 6829 (Piers 207)
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