Christianity : second part. The influence of the "Fathers" on the further development of Christianity by Zerffi, G. G. (Gustavus George) (1881)
Conway Hall digital collections
Various 19th century pamphleteers
Conway Hall digital collections - <a rel="nofollow" class="external free" href="https://conwayhall.org.uk/library/digital-collections/">https://conwayhall.org.uk/library/digital-collections/</a>