A composite volume mainly in the autograph of John Jones ('Myrddin Fardd') containing the names of some Caernarvonshire sheriffs arranged under houses in Llŷn and Eifionydd ('Y Tylwythau o ba rai y penodwyd Siryddion Sir Gaernarfon o Leyn ac Eifionydd'), pedigrees of various Llŷn families (Rhiw, Cefnamwlch, Saethon, Trygarn, Cefnllanfair and Madryn), notes on heraldry ('Arfau Bonedd'), more pedigrees (Nanhoron, Saethon, with a leaf from an older manuscript concerning Saython [sic]), short extracts from Caernarvonshire pedigrees concerning clergymen, etc., 'Traethawd byr, y'nghyd âg adfyfyriadau, ar Ach Iesu Grist .... wedi ei gyfieithu o Ffrangaeg Abb Giraudeau, a chwanegu atto, gan y Parchedig Dr. A. Clarke; a'i droi i'r Gymraeg gan T. Roberts' (printed extract incomplete), 'Arfau Bonedd' (Llŷn families), and a transcript of 'The Pedigree and Genealogy of the Ancient and Worshipfull Family of Jones of Llwyn Onn in the Parish of Wrexham and County of Denbigh collected out of the Books of Owen Salusbury of Rug Esqr. and other Authentick Genealogists by John Salusbury De Erbistock Anno Domini 1675'. Loose in the volume are a letter, ?1903, from the Reverend Evan Evans, Llansadwrn Rectory, Anglesey to 'Myrddin [Fardd'] (the name of a subscriber for the addressee's book, genealogical queries), and holograph verses by [Ebenezer Thomas] 'Eben Fardd' beginning 'Fenywod hawddgar! dowch o'n plaid'. The first section of the manuscript is marked 'Copy No 30'.
