Petrie, G. (1845). The ecclesiastical architecture of Ireland, anterior to the Anglo-Norman invasion: Comprising an essay on the origin and uses of the round towers of Ireland, which obtained the gold medal and prize of the Royal Irish Academy (Second edition.). Hodges and Smith.

Petrie, George. The Ecclesiastical Architecture of Ireland, Anterior to the Anglo-Norman Invasion: Comprising an Essay on the Origin and Uses of the Round Towers of Ireland, Which Obtained the Gold Medal and Prize of the Royal Irish Academy. Second edition. Hodges and Smith, 1845.