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A letter to Dr. James Gregory of Edinburgh in consequence of certain printed papers intituled, "The viper and file"; "There is wisdom in silence"; "An old story"; &c., which have lately been distributed by him / by Andrew Duncan senior, M.D. & P. and senior censor of the Royal College of Physicians, Edinburgh. Public Domain Mark. Source: Wellcome Collection.
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This material has been provided by The University of Glasgow Library. The original may be consulted at The University of Glasgow Library.