Edward Coke, Thomas Littleton, Francis Hargrave (1832). “The ... Part of the Institutes of the Laws of England; Or, a Commentary Upon Littleton: Not the Name of the Author Only, But of the Law Itself : Including Also the Notes of Lord Chief Justice Hale and Lord Chancellor Nottingham, and an Analysis of Littleton, Written by an Unknown Hand in 1658 - 9”, p.524
Winston Churchill's statement as President of the Air Council in War Office Departmental Minute (the original document is in the collection of Churchill Papers 16/16 at the Churchill Archives Centre in Cambridge), May 12, 1919.