The _Liber Hymnorum_ is the next selected. It is believed to be more than one thousand years old, and one of the most remarkable of the sacred tracts among the MSS. in Trinity College, Dublin. It is a collection of hymns on S. Patrick and other Irish saints, which has been published by the Irish Archæological and Celtic Society, under the superintendence of Dr. Todd. The three pages selected contain the hymn written by S. Fiach of Stetty, between the years 538 and 558, in honor of S. Patrick. The hymn is furnished with an interlinear gloss. The tenth of these MSS. is _The Saltair of S. Ricemarch_, Bishop of St. David’s between the years 1085 and 1096, a small copy of the Psalter containing also a copy of the Roman Martyrology. Of the four pages of this volume which have been selected for copying, two are a portion of the Martyrology and two of the Psalter. The first of these last contains the first two verses of the 101st Psalm, surrounded by an elaborate border formed by the intertwinings of four serpentine monsters. The initial D of Domine is also expressed by a coiled snake, with its head in an attitude to strike; the object of its attack being a creature which it is impossible to designate, but which bears some resemblance to the hippocampus, or sea‐horse. The second page of the Psalter contains the 115th, 116th, and 117th Psalms, in which the same serpentine form is woven into shapes to represent the initial letters. The version of the Psalms given in this volume differs from that used in England in Bishop Ricemarch’s time. It is written in Latin in Gaelic characters. The volume belongs to Trinity College, Dublin.