1. Yale Center for British Art. www.britishart.yale.edu
2. Thomas Gray Archive. www.thomasgray.org
3. The Oxford English Dictionary Online. www.oed.com
4. The Oxford Dictionary of National Biography. www.oxforddnb.com
5. Survey of London. Draft chapters, South-East Marylebone, vols 51 and 52. www.ucl.ac.uk/bartlett/architecture/research/survey-london/current-area-study-south-east-marylebone