Part of Breese Manuscripts,
Letters from Cyrus J. Evans, 1913, and J. P. Lewis, 1914, relating to a resolution in favour of autonomy in Welsh Education; a typescript copy of a letter to the Chancellor of the Exchequer on the Education Estimates, 1922-1923; and a report on the School Teachers (Superannuation) Bill, 1922.
'Llythyr y Rheithor at blwyfolion Llanystumdwy' ,
Part of Cwrtmawr manuscripts
'Llythyr y Rheithor at blwyfolion Llanystumdwy', being a letter (4 pp., printed) from the Reverend J. P. Lewis, Rheithordy, Llanystumdwy, Dydd Mercher Lludw [Ash Wednesday], 1914, to his parishioners, opposing Disestablishment and Disendowment of the established church; together with some manuscript notes by John Jones ('Myrddin Fardd'), possibly in preparation for an article.