Part of Sir John Rhŷs papers
Includes letters from J. Roland Phillips, William W. E. Wynne, Samuel Ferguson (10), Henri Gaidoz (10), George Butler, Henry Bradshaw (6), John Peter, A. H. Sayce (9), John Wordsworth (2), Max Müller (5), James Graves (5), William H. Bliss, James Coloquhoun Campbell, Emil Hübner (2), Hugo Schuchardt, Joseph Edkins, and James A. Picton.
Part of Ceiriog manuscripts
Letters addressed to John Ceiriog Hughes mainly on literary and eisteddfodic matters. The correspondents (O-P) include John Owen (Owain Alaw), 1863-1876, Joseph Parry (Pencerdd America), 1869-1871, Sir Thomas Duncombe Love Jones-Parry, 1872, John Roland Phillips, 1873, Thomas Price, Aberdare, 1866-1870, and Robert John Pryse (Gweirydd ap Rhys), 1855-1863.
Memoirs of the Ancient Family of Owen of Orielton ... (copy), with notes
Part of Egerton Allen Manuscripts
Allen's copy, with manuscript notes by him, of J[ohn] Roland Phillips: Memoirs of the Ancient Family of Owen of Orielton, co. Pembroke ... (London, 1886).