Walker, John & Charles
The three associates collectively known as J & C Walker were John Walker (fl. 1813-1873), Alexander Walker (1797?-1870) and Charles Walker (1799?-1872). John, Alexander and Charles Walker were the sons of John Walker Senior who had been Hydrographer to the East India Company and to the Admiralty. Our stock inclkudes their county maps for Samuel Lewis's Topographical Dictionaries of England (1831) and of Ireland (1837), and from "This British Atlas" (1868)