A bird's-eye view of a four-mile geological section of Sydney Harbour from North Sydney to Point Aconi, showing cliffs and the thickness of the different coal seams in this part of Cape Breton; also showing locations of pits and wharves. The illustration is taken from Richard Brown, Coal Fields and Coal Trade of Cape Breton (London, 1871).
Date: 1871
Reference: Thomas Cantley Nova Scotia Archives MG 1 vol. 1309 no. 4-14 (mfm 14979)
Nova Scotia Archives — https://archives.novascotia.ca/meninmines/archives/?ID=180
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