Gulf of St. Lawrence : Cape Breton Island, Louisburg Harbour /

• Main Authors: Great Britain. Hydrographic Office, issuing body., Potter, J. D. (John Dennett), active 1830-1892, bookseller., Bayfield, Henry Wolsey, 1795-1885., Washington, John, 1800-1863, cartographer., Orlebar, J., 1810-1891, surveyor., Great Britain. Admiralty., J. & C. Walker (Firm), engraver.
• Format: Map
• Language: English
• Subjects: Nautical charts; Cartes nautiques; Breton Island; Canada
• Online Access: http://hdl.handle.net/2027/mcg.ark:/13960/t76t87m2t

Early Canadian nautical maps were referred to as "Bayfield charts" in honour of Henry Wolsey Bayfield who began in the early 1800s charting the waterways of Canada. "Sold by J.D. Potter, Agent for the Admiralty Charts, 31 Poultry." "Engraved by J & C Walker." "Price One Shilling & Sixpence." Legend for material under the soundings: clay, gravel, mud, rock, sand, shells, shingle. Mounted on linen. Includes one coastal profile of Louisburg Lighthouse N.N.E. Relief shown by hachures; depths shown by soundings in feet. "Published at the Admiralty, 7th Decembr. 1859 under the Superintendence of Captn. Washington R.N.F.R.S. Hydrographer. Mode of access: Internet. Copy in McGill Library’s Rare Books and Special Collections, Map Collection: Numbered 65 on verso of map. Index to Bayfield Charts at McGill University 65