1 Dr. T Percy C. Kirkpatrick has kindly contributed the following addenda and corrigenda: p. 2, to ‘ St. George Ash, bishop of Cloyne ’ add ‘ (1695–7), of Clogher (1697–1717), of Deny (1717–18) ’; p. 9,1. 18, for ‘ reputation ’ read ‘ refutation ’; p. 14, W.[illiam] Colles (1811–72) is omitted from the index ; p. 21, read ‘ Professor James Apjohn (1796–1886)’; p. 21, 1. 32, read ‘Peter Street School’; p. 28, add ‘ Edwin Lapper, 1844–1919, succeeded Sir Charles Cameron as professor of chemistry in the Royal College of Surgeons of Ireland ’; p. 28, Sir Charles Cameron is not mentioned ; p. 28, read ‘ Chichester Alexander Bell (1848–1924) ’; p. 28, read ‘ Steevens's ’