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Lithotomus castratus; or Mr. Cheselden's Treatise on the high operation for the stone, thoroughly examin'd and plainly found to be Lithotomia Douglassiana, under another title: in a letter to Dr. John Arbuthnot. With an appendix, wherein both authors are fairly compar'd / [By R.H. i.e. Robert Houstoun]. Public Domain Mark. Source: Wellcome Collection.