John Henry Newman, Francis J. McGrath, FMS, Gerard Tracey (2006). “The Letters and Diaries of John Henry Newman Volume IX: Littlemore and the Parting of Friends May 1842-October 1843”, p.274, Oxford University Press
John Henry Newman (2000). “Lectures on the Present Position of Catholics in England: Addressed to the Brothers of the Oratory in the Summer of 1851”, p.390, Gracewing Publishing