Thayre describes himself as a ‘chirurgian’ in July 1603; but as his name does not occur among the members of the Barber-Surgeons' Company, and as he uses no such description in 1625, he was probably one of the numerous irregular practitioners of the period, and no sworn surgeon.
He published in London in 1603 a ‘Treatise of the Pestilence,’ dedicated to Sir Robert Lee, lord mayor 1602–3.
These passages have suggested the untenable view (Catalogue of the Library of the Royal Medical and Chirurgical Society of London, ii.
A similar resemblance of passages is to be detected in English books of the sixteenth century on other medical subjects, and is usually to be traced to several writers independently adopting and slightly altering some admired passage in a common source.
The work shows little medical knowledge, but preserves some interesting particulars of domestic life, and, though inferior in style to the writings of Christopher Langton and even of William Clowes, contains a few well-put and idiomatic expressions.