National Society of Electrotypers and Stereotypers (formerly the Federated Society of Electrotypers, Stereotypers and Assistants of Great Britain and Ireland and the Federated Society of Electrotypers and Stereotypers of Great Britain and Ireland) Archive, GBR/0012/MS Add.10445. Cambridge University Library. https://archivesearch.lib.cam.ac.uk/repositories/2/resources/13382 Accessed May 15, 2024.