 His work "The Organon of the Healing Art", and his first essay on homoeopathy, appeared in 1838.Epps was a frequent contributor to "The Lancet" until he adopted homoeopathy.In 1843 "The Lancet" refused to publish reports of homoeopathic treatment; he took rejected articles and published them in a pamphlet entitled "Rejected Cases", which also contained a vigorous letter to the editor of the "Lancet", his friend Wakley).