Author:
John Haygarth (1740-1827), Chester physician and pioneer in the prevention of smallpox [William Rathbone IV (1757-1809), Liverpool merchant and abolitionist; John Howard (1726-1790), prison reformer]
For the background to this letter see the section on 'Lazarettos and the Plague' in C. C. Booth's 'John Haygarth, FRS (1740-1827): A Physician of the Enlightenment' (2005). The penal reformer John Howard published his 'Account of the Principal Lazarettos in Europe' in 1789, and the letter to Howard referred to by Haygarth in the present item was one in which Haygarth set forth his view on the subject, dated 30 May 1789.