He afterwards lived in London, and was styled 'Chymical Physitian in Ordinary to the King' (1671); afterwards, on his engraved portrait, he is called simply 'medicus in ordinario regi' (1684).

He boasts that, on the favorable report of some of his patients, his majesty was pleased to command him 'to help some noble persons afflicted with a fistule.'

His book, 'Every Man his own Doctor,'[1] purporting to be a manual of health, but really treating of various diseases, reputable and disreputable, especially the latter, was nothing but an advertisement.

The British Museum copy of this work has written on the fly-leaf, in a contemporary hand — and probably a similar advertisement was written in every copy before it was sold — the following notice: 'The author is to be spoke with at his chamber in a sadler's house over against the mewes gate next the Black Horse nigh Charing Cross; his howers there are from eleven to five in the evening, at other times at his house in Knightsbridge.'

The only interest attaching to these discreditable works and their author is the singular fact that a man who might in the present day even be liable to prosecution, should in the reign of Charles II have enjoyed the status of the king's physician.