A statement signed by Ebenezer Richard on behalf of the Cardiganshire Calvinistic Methodist monthly meeting, held at Ponterwyd, 19 September 1833, certifying that Phillips was 'an Accredited Preacher in the Welch Calvinistic Connexion'; a letter, 5 December 1839, from Lewis Edwards, Bala, to Phillips; an account of 'The Bangor Controversy - 'Dadl Bangor'' occasioned by a lecture given by Phillips at the Tabernacle Chapel, Bangor on 19 November 1850 on 'Romanism, the Church and Dissent'; a copy of John Phillips: Dadl Bangor, yn cynnwys Sylwadau a draddodwyd mewn Darlith Gyhoeddus ... (Caernarfon, 1852).