1. Multiple collections cited from Special Collections, University of Reading (cited in endnotes as [item location, collection name, Reading]).
2. Several collections were consulted at the British Library, the full reference is Archives and Manuscripts, British Library, London (cited in endnotes as [item location, collection name], BL).
3. The Publishers’ Association archive held at the Publishers’ Association Head Office, London (cited in endnotes as PA Archive).
4. “Another, London.” The Bookman, October 1891, 28.
5. Ansell, Elaine. “Some Effects of the End of the Net Book Agreement.” New Library World 99, no. 1144 (1998): 248–253.