This authoritative reference work identifies thousands of marks from American, English and European potters. In the main body of the text, the marks are presented by potter in alphabetical order. Included in each potter's listing is the location of the firm, a brief history of the company, the span of years from the firm's establishment until its dissolution, and any former and subsequent company affiliations associated with that firm. The marks associated with that potter are presented in chronological order. Also provided are listings of further readings for those wishing either to delve deeper into the history of the firm or to view images of wares upon which these marks appear. American and Canadian importers, and the potters for whom they imported wares, are also identified. In addition, numerous appendices provide future information pertaining to ware types and printed patterns produced by the various potters, registry dates, and much more. A glossary of pottery terms and an extensive bibliography round out the presentation. This encyclopedia, years in the making, provides the most current research on potters spanning two hundred years and is the essential reference for everyone interested in ceramics.