On 5 December Christie’s will auction, as part of a lot of printed books and manuscripts, a map described as “an important manuscript map of New York City prepared by cartographers attached to Rochambeau’s forces during the Yorktown Campaign.” The 63×40-cm ink-and-watercolour map dates from 1781-1782 and is expected to fetch between $150,000 and $200,000. Christie’s item description is quite detailed.