Extremely Rare Miniature Redware Bowl with Three-Color Slip Decoration, attributed to Henry Adam, Hagerstown, MD, circa 1805-1819, diminutive bowl with flared wall, rounded rim, and coved shoulder, the surface dipped in whitish slip and decorated around the border with manganese banding overlain with manganese spots, the cavetto with wavy copper slip line decoration, the interior decorated with additional manganese slip banding overlain with perpendicular manganese drips. Interior surface covered in a light lead glaze. The bowl's style of decoration, involving dripping slip in perpendicular fashion over thin bands of slip, as well as its distinctive white, green, and brown color scheme, are both associated with the work of Henry Adam of Hagerstown, MD. Larger examples with related decoration are considered some of the masterworks of the Shenandoah Valley's early period of pottery production. Literature: For a related example, see Manger, Pottery from the Shenandoah and Cumberland Valleys, p. 13 and back cover. Very nice condition with some wear to interior. Diam. 3 1/2" ; H 3/4".