Book: Ames, Kenneth L. 1977 Beyond Necessity: Art in the Folk Tradition.
• Published: p.34, fig. 19; p.114, cat. no.83.Book: Lange, Amanda E. Delftware at Historic Deerfield, 1600-1800.
• Pair of bird pattern wall pockets: pp. 120-21, no. 73, with period American references to "flower horns"Catalogue: Pook & Pook Inc., Downingtown PA (sales cat.).
• 1827 dated Pennsylvania or Maryland or wall pocket sharing many design details: November 11-12, 2011, lot 339, perhaps more naturalistically modeled, with tip of "tail" not split,