H.W. Forsyth Harwood, 'Ingram, Viscount Irvine', in J. Balfour Paul, The Scots Peerage: Founded on Wood's Edition of Sir Robert Douglas's Peerage of Scotland (David Douglas, Edinburgh 1908), V (1908), pp. 9-20, at pp. 18-19.
M.M. Drummond, 'Ingram, Charles (1727-78), of Templenewsam, Yorks.', in L. Namier & J. Brooke (eds), The History of Parliament: the House of Commons 1754-1790 ((Boydell & Brewer), 1964), History of Parliament online. See also J.B. Lawson, 'Ingram, Charles (1727-78), of Temple Newsam, Yorks.', in R. Sedgwick (ed.), 'The History of Parliament: the House of Commons 1715-1754', ((Boydell & Brewer), 1970), History of Parliament online.
