Book: Teitelman, S. Robert, et al. 2010 Success to America: Creamware for the American Market Featuring the S. Robert Teitelman Collection at Winterthur.
• Published: No. 40, pp. 150-151.Book: McCauley, Robert Henry. 1942 Liverpool transfer designs on Anglo-American pottery.
• Description of print: no. 260, p. 128, plate XVI.Book: Arman, David & Arman, Linda. 1998 Anglo-American Ceramics Part I. Transfer Printed Creamware and Pearlware for the American Market 1760-1860.
• Possibly attributed to Shelton Group: Fig. P.39, p. 154.Article: Sprague, Laura Fecych. 1986 Liverpool-Type Pitchers Decorated for Portland. American Ceramic Circle Transactions. (No. 5): 26-41.
• Portland-related jugs details: Whole article. Pps. 38-39 for similar jug (fig. 16) and early 19th-century pen & ink drawing (fig. 17) as probable inspiration..Catalogue: Northeast Auctions, Portsmouth NH (auction catalogue).
• Jug bearing same prints (sides 1 & 2), painted in polychrome: August 3, 2013, Suzanna & Milton Miller sale, lot 540Book: Northern Ceramic Society. Made in Liverpool: Liverpool Pottery and Porcelain 1700-1850.
• Similar Portland observatory jug shown near creamware mug and glass beaker portraying Liverpool Lighthouse in somewhat similar manner: pp. 120-121, nos. 181-183Article: Lipfert, Nathan R. 08//2018 "Signals at Sea". Early American Life Magazine. 26-31.
• Detailed discussion of maritime flag usage: see p. 30 for example similar to Winterthur's.