John Groenveldt

His thesis, De Calculo Vesicæ (Utrecht, 1670), was translated into English and published in London in 1677, and with large additions in 1710.

Ten years afterwards he came to England, settled in Throgmorton Street, London, and was admitted a licentiate of the Royal College of Physicians on 2 April 1683.

[1] A female patient, to whom he is said to have administered thirty-six grains of the medicine, brought an action against him on the following 7 December, but though nearly twenty members of the college appeared on her behalf, a verdict was given in his favour.

[1] In May 1710 Groenveldt was living opposite the Sun Tavern, Threadneedle Street, but died apparently in the same year.

Groenveldt, or Greenfield, as he sometimes styled himself in England, was the author of a small treatise on his favourite medicine, entitled Tutus Cantharidum in medicina Usus internus, 1698 (2nd edition, 1703), which was translated into English, with additions, by John Marten, surgeon, in 1706.