* Lobel, Richard (1999), Coincraft's 2000 Standard Catalogue of English and UK Coins, 1066 to Date, Standard Catalogue Publishers, ISBN 978-0-9526228-8-8
* Symons, David (2009), "'Bringing to Perfection the Art of Coining': What did they make at the Soho Mint?", in Mason, Shena (ed.), Matthew Boulton: Selling What All the World Desires, New Haven, Ct.: Yale University Press, pp. 89–98, ISBN 978-0-300-14358-4
