Book: Bickerton, L. M. 1986 Eighteenth Century English Drinking Glasses: An Illustrated Guide. 431.
• Similar double opaque twist stem wine glass dated c. 1765: no. 645, p. 216Book: Volk, Joyce Geary. 2006 The Warner House: A Rich and Colorful History.
• Excavated shards of 18th century English opaque twist, baluster, and knop stems from Warner House, Portsmouth, NH: Fig 7.12, p. 85