File Llanstephan MS 57 [RESTRICTED ACCESS]. - Repertorium poeticum and Codd. MSS. Britannicorum Catalogus,

A manuscript in the autograph of the compiler, Moses Williams. The first part, entitled 'Repertorium Poeticum', contains poetry, the names of the poets arranged in alphabetical order and the first lines of the poems given under the authors' names, with references to sources but without regard to the alphabetical order of the first word in the said lines: this work therefore differs from Williams's Repertorium Poeticum ... (London, 1726), where the lines are arranged in the alphabetical order of the first word, and the author's name is added at the end of every line. The second part of the manuscript, entitled 'Codd. MSS. Britannicorum Catalogus', contains an attempt to indicate the manuscript sources of certain Welsh subjects, which are arranged alphabetically.
The references are more or less confined to manuscripts at the British Museum and at Jesus College, Oxford, to those belonging to John Powell of Talgarth (for whom see Llanstephan MSS 27, 41, 45, 62), and to those belonging to Moses Williams himself.