Talbot to his daughter, Matilda, to her daughter, Constance Stewart; Christie's London sale 10/84; Mrs. Harrison D. Horblit
Talbot, William Henry Fox. The Pencil of Nature. London: Longman, Brown, Green and Longmans, 1844–46. Plate XVI.
Schaaf, Larry J. William Henry Fox Talbot Catalogue Raisonné, Oxford: Bodleian Libraries, 2017. http://foxtalbot.bodleian.ox.ac.uk/.