1837 S.D.U.K. Map of Tripoli, Libya on the Barbary Coast, Northern Africa

The "Society for the Diffusion of Useful Knowledge" (1826 - 1848) was a Whiggish organization founded in 1828 at the instigation of idealistic British lord Henry Peter Brougham. The admirable goal of the Society was to distribute useful information via a series of publications to the English working and middle classes. It promoted self-education and the egalitarian sharing of all knowledge. While closely tied to the London University and publishing houses on the order of Baldwin and Cradock, Chapman and Hall, and Charles Knight, the Society failed to achieve its many lofty goals in finally closed its doors in 1848. Most likely the failure of the Society resulted from its publications being too expensive for its intended lower to middle class markets and yet not large and fine enough to appeal to the aristocratic market. Nonetheless, it did manage to publish several extraordinary atlases of impressive detail and sophistication. Their most prominent atlas consisted of some 200 separately issued maps initially published by Baldwin and Cradock and sold by subscription from 1829 to 1844. Afterwards, the Society combined the maps into a single world atlas published under the Chapman and Hall imprint. In its day, this atlas was unprecedented in its quality, scope, and cost effectiveness. Today Society, or S.D.U.K. as it is commonly known, maps are among the most impressive examples of mid-19th century English mass market cartographic publishing available. The S.D.U.K. is especially known for its beautiful and accurately detailed city plans. More by this mapmaker...

Chapman and Hall (fl. 1830 - present) was a British publishing house in London, founded in 1830 by Edward Chapman and William Hall. Upon Hall's death in 1847, Chapman's cousin Frederic Chapman became partner in the company, of which he became sole manager upon the retirement of Edward Chapman in 1864. In 1868 author Anthony Trollope bought a third of the company for his son, Henry Merivale Trollope. From 1902 to 1930 the company's managing director was Arthur Waugh. In the 1930s the company merged with Methuen, a merger which, in 1955 participated in forming the Associated Book Publishers. The latter was acquired by The Thomson Corporation in 1987. Chapman and Hall was sold again in 1998 as part of Thomson Scientific and Professional to Wolters Kluwer, who sold on its well-regarded mathematics and statistics list to CRC Press. Today the name of Chapman and Hall/CRC is used as an imprint for science and technology books by Taylor and Francis, part of the Informa group since 2004. The company is best known for its publication of the works of Charles Dickens (from 1840 until 1844 and again from 1858 until 1870), William Thackeray, Elizabeth Barrett Browning, Eadweard Muybridge and Evelyn Waugh. They continued to publish hitherto unpublished Dickens material well into the 20th century. In cartographic circles they are known as the primary publishers of the Society for the Diffusion of Useful Knowledge Atlas, a massive 200+ map atlas that was popular in England during the mid-19th century. Learn More...

John Walker (1787 - April 19, 1873) was a British map seller, engraver, lithographer, hydrographer, geographer, draughtsman, and publisher active in London during the 19th century. Walker published both nautical charts and geographical maps. His nautical work is particularly distinguished as he was an official hydrographer for the British East India Company, a position, incidentally, also held by his father of the same name. Walker's maps, mostly published after 1827, were primarily produced with his brothers Charles Walker and Alexander Walker under the imprint J. and C. Walker. Among their joint projects are more than 200 maps for the influential Society for the Diffusion of Useful Knowledge Atlas (SDUK). In addition they published numerous charts for James Horsburgh and the British Admiralty Hydrographic Office, including Belcher's important map of Hong Kong and Carless' exploratory map of Karachi. The J. and C. Walker firm continued to publish after both Walkers died in the 1870s. Learn More...