Article: Gray, Jonathan. 2019 William Adams III (1772 - 1829) and family. Transactions of the English Ceramic Circle. 30
• Published: p. 56, fig. 2Electronic: Transferware Collectors Club. Transferware Collectors Club Database of Patterns & Sources. Transferware Collectors Club 03/13/2024 https://www.transferwarecollectorsclub.org/members/database
• Pattern name listed as Seal of the United States (alternate names: Shell Edge with American Eagle; Eagle and Shield), Pattern No. 14091, Border: Shell-edge; Maker: William Adams III (& S), Stoke-on-Trent, Staffordshire (England), 1804-1829, with impressed Maker's Mark.