1. Astronomers at War: South v. Sheepshanks
2. Bennett J. A. Church, State and astronomy in Ireland (Armagh, 1990), 86–87.
3. Mitchel F. A. Ormsby MacKnight Mitchel, astronomer and general: A biographical narrative (Boston and New York, 1887), chap. 15, “Camden Hill”, 105–13.
4. On this see King Henry C. The history of the telescope (London, 1955), 248.