Book: Webster, Donald Blake. 1971 Decorated Stoneware Pottery of North America.
• Published: p. 185, no. 252, noting identical piece with mark of Thomas Haig of Philadelphia (1812-33). Suggests Henry was merchant.Catalogue: Crocker Farm, Inc. Crocker Farm Auction Catalogue.
• Somewhat similar form chicken waterer with cobalt painted in similar style: Spring 2022 sale, lot 330, attributed to Thomas Haig, Philadelphia, PA, c. 1870.Thesis: Myers, Susan Helen. 1977 Handcraft to Industry: Philadelphia Ceramics in the First Half of the Nineteenth Century. M.A. George Washington University
• Information on Henry: p. 180.Book: Whisker, James Biser. 1993 Pennsylvania Potters: 1660-1900.
• Information on Henry: p. 149.Book: James, Arthur. 1978 The Potters and Potteries of Chester County, Pennsylvania.
• Information on maker of similar feeders: p.71-72, 80, 85.Book: Schiffer, Margaret B. 1980 Arts and Crafts of Chester County.
• Illustrates a similar feeder.Catalogue: Pook & Pook Inc., Downingtown PA (sales cat.).
• Similar form feeder with more modest cobalt ornament: January 6-7, 2007, lot 869, impressed "Thos. Haig 975 N. 2nd St. Phila."Catalogue: Crocker Farm, Inc. Crocker Farm Auction Catalogue.
• Similar chicken waterer attributed to Thomas Haig: March 5, 2011 sale, lot 200. (For another, see November 2, 2013 sale, lot 562.)Catalogue: Pook & Pook Inc., Downingtown PA (sales cat.).
• Two stoneware feeders, one attributed to Thomas Haig, sold at auction: October 11-12, 2013, lots 328, 334 (the latter atrtributed to Haig).