A letter / from J. Keyser, surgeon and chymist, of Paris, to Mr. J. Wathen, surgeon, of London, in answer to his pamphlet, intitled, Practical observations on the veneral disease, &c. ... To which is added a letter from the learned Prof. Le Cat, of Rouen, with an account of a remarkable cure ... performed with ... [Keyser's] medicine.

Licence: Public Domain Mark

Credit: A letter / from J. Keyser, surgeon and chymist, of Paris, to Mr. J. Wathen, surgeon, of London, in answer to his pamphlet, intitled, Practical observations on the veneral disease, &c. ... To which is added a letter from the learned Prof. Le Cat, of Rouen, with an account of a remarkable cure ... performed with ... [Keyser's] medicine. Source: Wellcome Collection.