Rare J & A Walker sea chart locating all of the lighthouses in the British Isles, including extensive notes on the appearances of a number of the lighthouses.
The chart is apparently very rare. OCLC lists not copies and we found no examples listed in AMPR or any auction records going back more than 30 years.
J. & C. Walker was the imprint used by the Walker family of engravers and printers. They produced numerous high-quality geographical maps and nautical charts for a variety of institutions in the nineteenth century. John Walker (1787-1873) held the position of Hydrographer to the East India Company, a position also held by his father and namesake. John worked in partnership with his brothers, Charles and Alexander. The brothers published over 200 maps for the Society for the Diffusion of Useful Knowledge. They produced maps for James Horsburgh and the Admiralty, as well as the influential Indian Atlas.