Saggar atmosphere, or concentrate the effects of salts, metal oxides and other materials on the surface of their ware. Some pots may be carefully prepared for saggar firing. One method creates a smooth surface covered with clay slip, terra sigillata, which responds particularly well to the saggar technique. This slip covering may be burnished to achieve a gloss. Prepared pots are nestled into saggars filled with beds of combustible materials, such as sawdust, less combustible organic materials, salts and metals. These materials ignite or fume during firing, leaving the pot buried in layers of fine ash. Ware produced in filled saggars
Ellen and William Craft and her white master, Ellen Craft used her appearance to pass as a white man, dressed in male clothing, during their escape. As prominent fugitives, they were threatened by slave catchers in Boston after passage of the Fugitive Slave Act of 1850, so the Crafts emigrated to England. They lived there for nearly two decades and reared five children. The Crafts lectured publicly about their escape. In 1860 they published a written account, "Running a Thousand Miles for Freedom; Or, The Escape of William and Ellen Craft from Slavery". One of the most compelling of the many slave narratives published