Briggs, Asa (2005). "9. Munks Roll". A History of the Royal College of Physicians of London. Vol. IV. Oxford University Press. pp. 1548–1689. ISBN978-0-19-925334-0. Archived from the original on 7 February 2023. Retrieved 7 February 2023.
"Edgar Ashworth Underwood". history.rcplondon.ac.uk. Royal College of Physicians. Archived from the original on 10 February 2023. Retrieved 10 February 2023.
web.archive.org
"Edgar Ashworth Underwood". history.rcplondon.ac.uk. Royal College of Physicians. Archived from the original on 10 February 2023. Retrieved 10 February 2023.
Briggs, Asa (2005). "9. Munks Roll". A History of the Royal College of Physicians of London. Vol. IV. Oxford University Press. pp. 1548–1689. ISBN978-0-19-925334-0. Archived from the original on 7 February 2023. Retrieved 7 February 2023.