Cronin was born in 1801 in Cork, Ireland, before moving to
Dublin for health reasons in about 1826. In Dublin, he studied medicine at the
Meath Hospital, and later utilised his medical ability on
Anthony Norris Groves' pioneering
mission to
Baghdad,
Ottoman Empire – after the death of his first wife in 1829, Cronin went with Groves to administer medical support including dealing with an outbreak of
plague. While in
Iran and later India, he also dealt with
cholera and
typhus using homeopathic principles. Cronin returned to England in 1836, where, as a medical practitioner, he became an early adopter of homeopathy in the UK – Cronin is estimated to be the fifth such practitioner to introduce homeopathy. He was a member of the
English Homeopathic Association, and in 1858 he became the last man to become a
Lambeth MD before the
Medical Act 1858 abolished this particular qualification. Cronin remarried and settled in
Brixton where he lived until his death in 1882. Cronin's eldest son
Eugene Francis Cronin also took up homeopathic practice, and another of his sons,
Augustus Cronin became an honorary dentist to the
London Homeopathic Hospital. ==Faith==