Book: Palmer, Arlene. 1993 Glass in Early America: Selections from the Henry Francis du Pont Winterthur Museum. 425 pp.
• Published: no. 419, pp. 400- 401Article: Palmer, Arlene. 1974 From Beer to Birdcages: Glass in Colonial America. Delaware Antiques Show Catalogue. 81-89.
• Published: fig. 7, p. 89Book: Noel Hume, Ivor. 1969 Glass in Colonial Williamsburg's Archaeological Collections.
• Similar form of bird feeders with heads excavated in London and Williamsburg, Virginia: p. 32, fig. 20 (London fragment) and (right) fragment from cellar on Nicholson St., near Anthony Hay cabinet shop.