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A letter to Sir William Fettes, Bart. : affording demonstrative evidence, that much greater benefit will arise to those who have at once to struggle both with poverty and disease, from improving the Royal Infirmary by the establishment of a lock hospital, and an hospital for incurables, than by beginning a new rival infirmary, which may be productive of many evils / By Andrew Duncan, Sen. Public Domain Mark. Source: Wellcome Collection.