John Haygarth, line engraving by W. Cooke, 1801

Line engraving portrait of John Haygarth by engraver W. Cooke, 1801, after an original by J. H. Bell. Haygarth was the physician who designed the fictitious-tractor experiment at Bath General Hospital in January 1799, which is the founding placebo-controlled clinical trial in the modern Anglophone medical literature. Held at Wellcome Collection, London (reference M0001844); licensed CC BY 4.0.