Henry Field followed in his father's footsteps and became an apothecary. In 1807 he was elected apothecary to Christ's Hospital in London, a post which he occupied until shortly before his death in 1837. Field was a member of the Society of Apothecaries and in conjunction with a colleague launched free courses of lectures on medicine for apprentices and students. This led to the establishment of regular lectures within the society. For many years Field also held the office of treasurer of the London Annuity Society for the benefit of the widows of the apothecaries. This has been alluded to in this portrait by Samuel Lane (1780-1859), which shows a document on the table besides Field with the name of the society written at the top.