The manuscript is dated by James Carney to about 1500. His description of the manuscript is in his “Poems on the O’Reillys”, pages ix, 235; most of the poems are there edited. It had previously been noticed by Quiggin in ‘Prolegomena to the study of the later Irish bards, 1200-1500’, page 102. Written across the page; at folios 4 verso and 6 verso a second column is created out of the broad right margin.

The manuscript is written in the following hands.

1. Text. A good hand broadly similar in appearance to Eoghan Carrach Ó Siaghail’s (Adv.MS.72.1.29). Cliamain Ó Bolgaidh’s comortus, folio 8 verso, may provide a clue to its identity. Some capitals are decorative.

2. Folio 5 recto. More curved than hand 1.

3. Folios 4 recto, 6. Duibhgeannán Beag (Ó Duibhgeannáin?).

4. Folio 8 verso. Cliamain Ó Bolgaidh.

The manuscript contains the following marginalia:

(i) ‘Commortus’ (? hand 3). (Folio 2 verso (page 4).)

(ii) (?) “An lia lánighi an aoin”, 1 quatrain (hand 2). (Folio 5 recto (page 9).)

(iii) (a) largely illegible lines along top and bottom; (b) ‘as fada le Grainne oig gu bfaicean si misi’; (c) ‘a Muire mor as mairg ga tagand i nErann’ (? Hand 1). (Folio 5 verso (page 10).)

(iv) ‘Dus in maith in penn so a... domun duth( ) a l...’ (visible under ultra violet light, hand 3). (Folio 6 recto (page 11).)

(v) “Misi Duibgennáin bheg” (visible under ultra violet light, hand 3). (Folio 6 verso (page 12).)

(vi) ‘Comortus ann so re Magu[idhir?] .i. tri b...caeb... misi Cliamai[n mac] I Bolgaid’ (hand 4). (Folio 8 verso (page 16).)

The contents (text) are as follows:

(i) Page illegible. It must, however, have contained quatrains 1-18 of Tadhg Óg Ó Huiginn’s “Do mheall an sochar síol gColla”, 39 quatrains, printed by McKenna in “Aithdioghluim Dána”, volume 1, page 110. Quatrains 19-39 appear semi-legibly on folio 1 verso. Cf. Carney, ‘Miscellanea’, page 302; Carney, “Poems on the O’Reillys”, page x. (Folio 1 recto (page 1.)

(ii) ‘Fer a choimeta ag cloind Fergna’, 324 lines (approximately) interspersed with prose. Crosántacht on Pilib m. Briain m. Féilim Uí Raghallaigh, died 1508. (Folio 2 recto (page 3), line 1.)

(iii) Cearbhall Ó Dálaigh. “Ni ar áeis iartur inmhe”, 34 quatrains. On the same. Carney, “Poems on the O’Reillys”, page 151. (Hand 3 repeats ascription.) (Folio 4 recto (page 7), line 14.)

(iv) Tadhg Óg Ó Cianán. “Trian Connacht ar coimet aeinfir”, 27 quatrains. On the same. See Carney, “Poems on the O’Reillys”, page 157. (Folio 5 recto (page 9), line 5.)

(v) Cearbhall Ó Dálaigh. ‘...ch thigerna’, 8 quatrains. Acephalous due to torn leaf; incomplete due to excision of following leaf. On the same and his brother Domhnall? See Carney, “Poems on the O’Reillys”, page 162. (Folio 5 verso (page 10), line 13.)

(vi) “Ge tá sibsi leth ar leth”, 18 quatrains. Acephalous; “dúnadh is [Da co]”. On the same. See Carney, “Poems on the O’Reillys”, page 163. (Folio 6 recto (page 11), line 1.)

(vii) Lughaidh Ó Dálaigh. “Truagh ar n-echtra go hÁth Truim”, 40 quatrains. Elegy on Féilim m. Seaáin m. Pilib Uí Raghallaigh, died 1447. See Carney, “Poems on the O’Reillys”, page 166. (Folio 6 recto (page 11), line 19.)

(viii) Cearbhall Ó Dálaigh. “Ni mar chách as caínte Brían”, 40 quatrains. Elegy on Brian, son of above, died 1482. See Carney, “Poems on the O’Reillys”, page 173. (Ascription and some other jottings are by a later hand – hand 2?). (Folio 7 recto (page 13), line 12.)

(ix) ( )r( )an Ó Cuirnín. ‘Rath Temra ag togha Domhnaill’, 15 quatrains. On Domhnall, son of above? See Carney, “Poems on the O’Reillys”, pages 179, 246. (Folio 8 verso (page 16), line 1.)