An extremely interesting manuscript - probably the smallest Welsh manuscript in existence, though it is 1.5 inches thick - which was written by Thomas Evans, Hendreforfudd, 1618-1622, and consists mostly of prayers and englynion.
Bound up between pp. 12 and 13 is a copy of an early edition of the Llyfr Plygain or Primer, dated 1618 and containing 42 pp. but imperfect as it contains none of the prayers, litany or psalms. This is probably the volume referred to by Gweirydd ap Rhys in Hanes Llenyddiaeth Gymreig, pp. 402-3; it is not mentioned in Angharad Llwyd's Catalogue of the Pengwern MSS (Transactions Cymmrodorion, 1828, p. 50).

Three paper rolls, on rollers, containing four cywyddau by Iolo Morganwg, dated 1799-1810 (E10/1), Welsh poetry by Iolo, including over 100 englynion and forty-two dyrïau, dated 1778-1816 (E10/2) and Iolo's bardic alphabet, [c. 1817] (watermark 1815) (E10/3); together with another blank roll and an empty roller (E10/4-5). Also in the box is a bundle of papers containing a 'Survey for Mr Davies Pantysgallog', [1824] (E10/6); a few miscellaneous maps and drawings (E10/7); and three scraps of parchment, one containing a miniature painting of some goats (E10/8-10).

Llyfrau nodiadau o waith William Cosslett (Gwilym Elian) yn cynnwys cerddi holograff, 1856-1900, ar amryw destunau. = Notebooks of William Cosslett (Gwilym Elian) containing holograph poems, 1856-1900, on various subjects.