The son of an Army officer stationed in India, his father and mother both being Irish. He began at the age of 17 to study medicine at Galway, then at Dublin, and in 1883 at Edinburgh. Having qualified, he became Resident Clinical Assistant at the Richmond Hospital, Dublin; next Resident Medical Officer at the Fever Hospital, Netherfield Road, Liverpool; he then went many voyages as surgeon on the P & O and other mail-boats, and began general practice in Shropshire. He afterwards moved to East Grinstead, Sussex, where he established a large connection and took a leading part in local politics. In 1894 he was appointed Medical Officer of the East Grinstead Workhouse and Urban District. Whilst studying for the FRCS he went up daily to St Bartholomew's, yet continuing his East Grinstead practice. Engaging in local politics, he was elected in 1899 to the East Grinstead District Council, and in 1901 he was its Chairman. He became also the member of the East Sussex County Council for East Grinstead, and of its Sanitary Committee. In 1903, after studying diseases of the skin in Vienna, he set up at 94 Harley Street as a dermatologist, and was appointed Pathologist and Medical Officer of the Light Department of the Hospital for Diseases of the Skin, Blackfriars Hospital, also Dermatologist at the Alexandra Hospital for Hip Disease, Queen Square. At the end of six years he was prospering, when his somewhat sudden death occurred on January 25th, 1909, in Devonshire Street, Portland Place, and he was buried at the cemetery of the Franciscan Monastery, Crawley, Sussex. He was survived by his widow and two young children. Publications:- Hartigan published dermatological papers concerning the use of radium and of ionization.