- NLW MS 18815B.
- Ffeil
Welsh, English. Formerly J. Seymour Rees MS 182.
Welsh, English. Formerly J. Seymour Rees MS 182.
Welsh. Formerly J. Seymour Rees MS 183.
Casgliad o farddoniaeth R. Williams Parry.
Welsh. Formerly J. Seymour Rees MS 187.
Welsh. Formerly J. Seymour Rees MS 189.
Welsh. Formerly J. Seymour Rees MS 191.
Hen Atgofion (W. J. Gruffydd). Ail gyfres (5 pennod), allan o Y Llenor.
Welsh. Formerly J. Seymour Rees MS 192.
Detholion o 'At ohebwyr o Gymru' (gol. O. M. Edwards),
'Hen grefftau Ceredigion. Bywyd cefn gwlad'. Papur a ddarllenwyd gan Iorwerth Peate yng nghyfarfod Cymdeithas Hynafiaethol sir Aberteifi yn Cilcennin, 1 Meh. 1929. Teipysgrifau. Welsh. Formerly J. Seymour Rees MSS 193-94.
'Clwb yr Hosan Las'. Casgliad o ysgrifau gan W. Llewelyn Williams a godwyd o'r South Wales Weekly Post, 7 Hydref 1893-26 Mai 1894. Welsh. Formerly J. Seymour Rees MS 196.
'Memoir of Alfred Wellesley Rees' by J. K. Hudson.
English. Formerly J. Seymour Rees MS 197.
Rhestr Testunau Eisteddfod Genedlaethol Castell Nedd, 1934, gyda llofnodion rhai Cymry amlwg arni,
Welsh. Formerly J. Seymour Rees MS 212.
Ysgrifau allan o'r Tyst ar emynyddiaeth.
Welsh. Formerly J. Seymour Rees MS 218.
English. Formerly J. Seymour Rees MS 224.
A volume of newspaper cuttings mainly relating to Aberaeron.
Welsh, English. Formerly J. Seymour Rees MS 232.
Cyfrol yn cynnwys ychydig o nodiadau ar Gapel Ciliau Aeron, etc.
Welsh, English. Formerly J. Seymour Rees MS 237.