Peritia: journal of the Medieval Academy of Ireland 12 (1998)
Howlett (David): Vita I sanctae Brigitae.
In Peritia 12 (1998), pp. 1–23.
Analyses the language and style of this Vita (based on MS Additional 34124), arguing in favour of its precedence over Vita II and its authorship by Ailerán of Clonard.

Herren (Michael W.): Scholarly contacts between the Irish and the southern English in the seventh century.
In Peritia 12 (1998), pp. 24–53.
Examines evidence for Irish presence and cultural influence in southern England, drawing mainly on Aldhelm’s writings and Latin-Old English glossaries.

Howlett (David): Hellenic learning in Insular Latin: an essay on supported claims.
In Peritia 12 (1998), pp. 54–78.
On the knowledge of Greek in Britain and Ireland before the 9th century.

Howlett (David): The Brigitine hymn Xpistus in nostra insula.
In Peritia 12 (1998), pp. 79–86.
Xpistus in nostra insula que uocatur Hibernia, edited from TCD E 4. 2, UCD-OFM A 2 and Palatinus latinus 482; with English translation.

Mc Carthy (Daniel): The status of the pre-Patrician Irish annals.
In Peritia 12 (1998), pp. 98–152.
Studies the non-Irish pre-Patrician entries in the annals, focusing on the Annals of Inisfallen and the Annals of Tigernach, and advances the hypothesis that these are based on an early 5th c. chronicle by Rufinus of Aquileia.

Maund (K. L.): Sources of the ‘world chronicle’ in the Cottonian Annals.
In Peritia 12 (1998), pp. 153–176.
Examines the early section of the Annals of Boyle with the aim of identifying the sources used, relating it to the world chronicle sections in other Irish annals.

Ó Corráin (Donnchadh): Creating the past: the early Irish genealogical tradition.
In Peritia 12 (1998), pp. 177–208.
Argues that the early Irish genealogies were produced and preserved by clerical scholars who adopted biblical genealogical models, and emphasises their written character, derived from Christian Latin scholarship, over the pagan and oral.

Charles-Edwards (T. M.): The construction of the Hibernensis.
In Peritia 12 (1998), pp. 209–237.
Studies the textual relationship of De contrariis causis (book 67 in recension A of Collectio canonum Hibernensis) and corresponding material in other books (21–29), and suggests that the A recension is unfinished and was released after the death of compiler Ruben of Darinis (†725), while the B recension is based on a corrected and expanded copy, possibly the work of his collaborator Cú Chuimne of Iona (†747).

Howlett (David): Synodus prima Sancti Patricii: an exercise in textual reconstruction.
In Peritia 12 (1998), pp. 238–253.
From Cambridge, Corpus Christi Library, MS 279; with English translation.

Ó Corráin (Donnchadh): The Vikings in Scotland and Ireland in the ninth century.
In Peritia 12 (1998), pp. 296–339.
Argues that the kingdom called Lothlend (also Laithlind, Laithlinn, later Lochlainn) in Irish sources was not located in Norway but had been established in Scotland before 825 by Norwegian Vikings.

Jaski (Bart): Druim Cett revisited.
In Peritia 12 (1998), pp. 340–350.
AU ad annum 575; criticism of R. Sharpe, Life of St. Columba and the redating of the meeting at Druim Cett to 590.

FitzPatrick (Elizabeth): The inauguration of Tairdelbach Ó Conchobair at Áth an Termoinn.
In Peritia 12 (1998), pp. 351–358.
Identifies Áth an Termoinn with Áth Carpait, in the termonland of Es mac nEirc, at Boyle (Co. Roscommon).