F. W. Gibbs: William Lewis and Platina. In: Platinum Metals Rev., 1963, Band 7 Nr. 2, S. 66–69 (PDF)
web.archive.org
Kees van Strien: A Medical Student at Leiden and Paris William Sinclair 1736-38: Part I. In: Proceedings of the Royal College of Physicians of Edinburgh. Band 25, 1995, S. 294–304 (PDF (Memento vom 24. September 2006 im Internet Archive))
