
Letter to John Croker (8 August 1815), as quoted in The History of England from the Accession of James II (1848) by Thomas Babington Macaulay, Volume I Chapter 5 http://www.worldwideschool.org/library/books/hst/european/TheHistoryofEnglandfromtheAccessionofJamesIIVol1/chap5.html, p. 180.; and in The Waterloo Letters (1891) edited by H. T. Sibome