A union catalogue, the Catalogue of American Engravings describes engravings issued as separate publications or as illustrations in books and periodicals from the early eighteenth century through the year 1820. Included are portraits, views, poltical cartoons, and illustrations covering many subjects and genres. Excluded are maps and ephemera, such as bookplates, billheads, trade cards, and currency. Approximately 85 percent of the holdings are at AAS. For more information on this catalogue, consult the introduction.