Groenveldt was a famous lithotomist, using the suprapubic technique. He also enjoyed a rather unsavoury reputation as a quack for his determination to promote the use of cantharides. He changed his name to Greenfield when he came to England from Holland. in 1674 or 1675. See his earlier shorter work on the same subject, Lithologia. A treatise of the stone & gravel: Their causes, signs, & symptoms, with methods for their prevention and cure. And some account Also of the manner of the collotian section. Written in Latin ... and rendred Into English ... London, 1677. Also see his more extensive and illustrated edition, Dissertatio lithologica variis observationibus et figuris illustrata. London: Typis Joannis Bringhurst, 1684