Piers note: No. 4.1. Fort Clarence: Entrance and Drawbridge over North Ditch. Inside is seen flat-arched entrance to sloping, curved passage leading down to postern in escarp of west ditch. Looking Southeast from glacis.
Reference: Royal Engineers Nova Scotia Archives number 6823 (Piers 4.1)
Nova Scotia Archives — https://archives.novascotia.ca/royalengineers/archives/
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