Letters, 1883-1928; diaries, 1923-1932; biographical materials of Welsh interest; sermons; addresses and papers on religious, moral, political and historical subjects, including Congregationalism; poetry, including hymns; and papers relating to the history of Ebenezer Welsh Congregational Church, Cardiff, and to his biography of Griffith John, missionary to China, including letters from him, 1889-1894, and proof copies of Griffith John, D.D.: Arwr China.