Seals in Medieval London: A Catalogue Seals in Medieval London: A Catalogue, by John A. McEwan, London Record Society Extra Series 1 (London, 2016). Offers color images of a wide sample of seals used by Londoners and their institutions from c. 1050 to c. 1300, arranged by the person or institution they represented, such as kings, nobility, monastic houses, hospitals, the city of London, London Bridge, and ordinary men and women, among other categories.
DigiSig Digital Sigillography Resource is an online-searchable database of seals curated by John McEwan. The website offers a number catalog records of seals relating to Londoners and London’s coporations. The project accumulated datasets from various archives, museums, and educational institutions.