↑ Matthews, L.G. (1967). The Royal apothecaries. Publications of the Wellcome Historical Medical Library. Wellcome Historical Medical Library. p.170. Retrieved 30 April 2019.
↑ Matthews, L.G. (1967). The Royal apothecaries. Publications of the Wellcome Historical Medical Library. Wellcome Historical Medical Library. p.171. Retrieved 30 April 2019.
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