Fischer, Johann Conrad: Tagebücher. Bearbeitet von Karl Schib. Schaffhausen 1951.
Croucher, John H. (ed.): Plain Directions for Obtaining Photographic Pictures by the Calotype, Energiatype, and Other Processes on Paper. London 1847 (Wellcome Collection, Stand 10.4.2023).
Stevenson, Sara: The London Circle: Early Explorations of Photography: The Willats album in the Firestone Library, Princeton University. Gillett G. Griffin Memorial Lecture vom 2. April 2017 (Princeton Graphic Arts Collection, Stand 12.4.2023).