Speaking of this document, the learned Professor says: "This prayer is divided into two parts. The first consists of twenty-eight petitions or paragraphs, each paragraph beseeching the mercy and forgiveness of Jesus through the intercession of some class of the holy men of the Old and New Testament, who are referred to in the paragraph, or represented by the names of one or more of the most distinguished of them. The first part begins thus:--'I beseech the intercession with Thee, O Holy Jesus! of thy four Evangelists who wrote thy Gospel, Matthew, Mark, Luke, and John'. The second part consists of seventeen petitions to the Lord Jesus, apparently offered at Mass time, beseeching Him to accept the sacrifice then made for all Christian Churches, for the sake of the Merciful Father, from whom He descended upon the Earth, for the sake of His Divinity, which the Father had overshadowed, in order that it might unite with His humanity, for the sake of the Immaculate body from which He was formed in the womb of the Virgin. The second prayer begins thus: 'O Holy Jesus! O Beautiful Friend!' etc., etc." The prayer is found in the _Leabhar Buidhe Lecain_ (or Yellow Book of Lecain), in the library of Trinity College, Dublin, (MS. H. 2. 16, T.C.D., col. 336). _The Yellow Book of Lecain_ is a volume consisting at present (notwithstanding many losses) of 500 pages of large quarto vellum; and with the exception of a few small tracts in somewhat later hands, is all finely written by Donnoch and _Gilla Isa_ Mac Firbis, in the year 1390. It would appear to have been, in its original form, a collection of ancient historical pieces, civil and ecclesiastical, in prose and verse. O'Curry enumerates these pieces at page 191 of his work on the _MS. Materials of Irish history_. ORATIO COLGANI sancti[3] (Ua Duinechda, ob. A.D. 789). Sapientis et Prespiteri et Scripæ omnium Sanctorum incipit qui cunque hanc orationem cantaverit veram penitentiam et indulgentiam peccatorum habebit et alias multa gratias, id est, Ateoch fuit a Isa naemh do cheithre suiscela, etc. [3] This title is from Michael O'Cleary's copy, made in 1627.--The Prayer is from a vellum MS. written in 1390. [PART I.] 1. I beseech the intercession with thee, O holy Jesus, of thy Four Evangelists, who wrote thy Divine Gospel, viz., Matthew, Mark, Luke, and John. 2. I beseech the intercession with thee of thy four chief Prophets, who foretold thy Incarnation, Daniel, and Jeremiah, and Isaiah, and Ezechiel. 3. I beseech the intercession with thee of the nine degrees of the Church on Earth, from the Psalm-singer to the Bishop. 4. I beseech the intercession with thee of all the elect who have taken these degrees from the commencement of the New Testament to this day, and who shall adopt them from this day to the day of judgment.