A manuscript entitled 'Immanuel neu Ddirgelwch Cnawdoliaeth mab Duw' in the hand of the Reverend Samuel Williams. The text is a Welsh translation of Archbishop James Ussher's Immanuel: or, The mystery of the incarnation of the Son of God (1638). Samuel Williams ends his text with a citation from the work of the poet Sion Phylip.

A manuscript containing 'Historia Judas', 'Trioedd Taliesin' and a fragment of 'Purdan Padric'.

A manuscript containing the 'Demetian Code' of Welsh laws.
The text seems to follow pretty closely the text of the Ancient Laws and Institutes of Wales (Vol. i, pp. 408, xv-590, l. 2).

Poetry in praise of William Owen of Henllys (c. 1486-1574) and his son George Owen (c. 1552-1613), of George William Griffith (1584-1655?) of Penybenglog, Pembrokeshire and others. The text is in several hands; pp. 1-62 shows beautiful penmanship. Some of the poems are dated and several (Dafydd Emlyn (pp. 145, 161, 186), Dafydd Llwyd Mathew (pp. 149, 153), Gruffudd Hafren (p. 157), Harri Howel (p. 180), Robert Dyfi (p. 182), Siams Emlyn (p. 183) appear to be autograph. Pp. 129-136 are apparently in the autograph of R. Phillipp [Rhisiart Phylip]. Other cited poets include Iolo Goch, Dafydd Nanmor, Sion Mawddwy and Taliesin.

A manuscript in the hand of 'W: P:' containing the laws of Hywel Dda.

A manuscript containing vocabularies 'communicated by Mr Baxter 1714', 'by John Rhydderch 1710' and by 'David Wynn Rector of Machynlleth'.

A manuscript containing Brut y Tywysogion; measurements of Britain; the Twenty-four Knights of King Arthur's court; the pedigrees of British kings and rulers; etc.

A manuscript containing an 'Important Corpus of Welsh Poetry' compiled by the Reverend Samuel Williams and Iaco ab Dewi [James Davies], with the first lines of the poems given alphabetically in an index. The volume also contains 'Histori Pren y Fuchedd', and a (non-autograph) letter from Siôn Mawddwy to Meurig Dafydd. Added at the end of the volume is a fifty-page index to the authors of the poems compiled by Richard Morris in 1747. Ff. 196-243 (containing poems numbered 632-737) are in the autograph of Iaco ab Dewi, while the remainder of the volume, excluding the end index, is in the hand of Samuel Williams. The poets cited include Taliesin, Iolo Goch, Dafydd ap Gwilym, Siôn Mawddwy, Gruffudd Hiraethog, Tudur Aled and Siôn Phylip.

A manuscript containing poetry, prophecies, 'histories', etc. and including 'Kynghorev Kattwn ddoeth ar bardd glas or gadeir' (pp. 27-29). The poets cited include Taliesin, Iolo Goch, Siôn Cent and Lewys Morganwg.
The text beginning at p. 39 is imperfect and the end is wanting from the texts beginning at pp. 42, 80, 116. Four leaves, more or less fragmentary, by a later hand, have been bound between pp. 82 and 83, the end wanting from the text on the last leaf of this section. At p. 112b, c is a misplaced leaf containing English poetry.

A manuscript containing a copy of Brut y Brenhinedd from the British Museum MS Bibl. Cotton. Cleopatra B. v.

A manuscript containing a copy of the Welsh Laws taken from Brit. Mus. MS Bibl. Cotton. Cleopatra B. v. 2.

A manuscript written c. 1727 (see p. 216) containing poetry of Dafydd ap Gwilym, Edmwnd Prys, Guto'r Glyn, Siôn Phylip and others; and articles of agreement between Richard Mytton, Esq. and his tenants in the lordship of Mawddwy, drawn up at Shrewsbury on the 11th of September 1597 in the presence of T. Owen and W. Leighton, chief justice of North Wales.

A manuscript containing the Welsh Laws, being a transcript of British Museum MS Harleian Titus D. II. Three folios at the beginning and two at the end contain poetry in Welsh and Latin, etc. There are also some items of a corn account.
The general style of the handwriting, which is not all in the same hand, is suggestive of the manuscripts of Dr John Davies, Mallwyd, which were copied partly by him and partly on his behalf.

A manuscript containing Y Marchog Crwydrad, being a translation into Welsh of W[illiam] Goodyear's English version of Le Voyage du Chevalier Errant by Jean de Cartigny. Egerton Phillimore has inserted the following note: 'This MS. was written by Jeuan ab Jeuan ab Madoc in the parish of Bettws, near Bridgend, Glamorganshire, in about 1575, and differs materially from the other two known MSS. - in fact it is a distinct translation, and interesting as a specimen of Glamorgan dialect. This is far the most perfect MS. of the Welsh translations of this work. The first folio is gone but is preserved in a slightly later transcript ... the missing fol. 74 ... is said to be in Brit. Mus: MS. 100 Harl: D. XVII. 2414'. On the front of the volume is written 'No. 25 / No. 144 Hauod [although this manuscript is not mentioned by Iolo Morganwg as among the Hafod collection] / No. 8'.

A manuscript written c. 1556 (see p. 184) containing triads (pp. 1-6); theological tracts (pp. 7-8, 26-42, 142-146, 152, 154, 167); a calendar (pp. 43-64); poetry (pp. 9-25, 65-141, 147, 149); etc. The poets cited include Taliesin, Iolo Goch, Siôn Cent and Dafydd Gorlech.

A manuscript containing Brut y Brenhinedd.

A manuscript containing dated extracts from Brut y Tywysogion (pp. 1-16); and a chronological table 'out of Sir Tho. S. Sebright's MS. No 13. Ex libro D'ni Jo. Prise Militis'.

A manuscript containing Historia vii Doethion Rhufain from the Red Book of Hergest, line for line.

A manuscript written c. 1648 (see p. 658) containing poetry, the poets cited including Taliesin, Iolo Goch, Dafydd ap Gwilym, Wiliam Cynwal and Siôn and Rhisiart Phylip. An index, with the poets' names arranged alphabetically, has been added at pp. 659-672 by Richard Morris for William Jones in London, 1746.
Many lines and half lines are wanting throughout the text owing probably to the imperfection or illegibility of the originals.

Welsh poetry transcribed by Moses Williams from Llyfr Coch Hergest (the Red Book of Hergest), cols 1026, 1028-1031, 1034, 1039-1049-1056. At the end of the manuscript is a copy of a letter (f. 60), dated at Oxford, 7 September 1708, relating to the burning of Irish and British manuscripts by Jesuit missionaries in Brittany, 'excepting such as tended to Devotion'.