Book: Butler, Robin. 2009 Great British Wine Accessories 1550-1900.
• Generally similar English & Irish folding corkscrews, some "Irish harp" type: pp. 46-47, nos. 3/10-/11, 3/14-/15.Book: Butler, Robin. 2009 Great British Wine Accessories 1550-1900.
• Chapter on British corkscrews: pp. 40-65