1844 Black Map of Northern Italy (Tuscany, Piedmont, Venice)

Charles and Adam Black (fl. 1807 - present) were map and book publishers based in Edinburgh. Charles and his uncle, Adam, both of Edinburgh, Scotland, founded their publishing firm in 1807. They published a series of maps and atlases throughout the 19th century. In addition to an array of atlases, the Black firm is known for their editions of the Encyclopedia Britannica (1817 - 1826) and the first publishing of Sir Walter Scott's novels in 1854. In 1889 the A. & C. Black publishing house moved to London where it remains in operation to this day.

Sidney Hall (1788 - 1831) was an English engraver and map publisher active in London during the late 18th and early 19th centuries. His earliest imprints, dating to about 1814, suggest a partnership with Michael Thomson, another prominent English map engraver. Hall engraved for most of the prominent London map publishers of his day, including Aaron Arrowsmith, William Faden, William Harwood, and John Thomson, among others. Hall is credited as being one of the earliest adopters of steel plate engraving, a technique that allowed for finer detail and larger print runs due to the exceptional hardness of the medium. Upon his early death - he was only in his 40s - Hall's business was inherited by his wife, Selina Hall, who continued to publish under the imprint, "S. Hall", presumably for continuity. The business eventually passed to Sidney and Selina's nephew Edward Weller, who became extremely prominent in his own right.