Manuscripts of, or collected by, John Edwards Griffith, [c. 1715]-1929, including pedigrees, memoranda and genealogical notes relating mainly to Anglesey and Caernarvonshire; a volume of pedigrees by John Ellis, Tai Croesion, 1723; manuscripts of William Williams, Llandygái; and some 350 letters, [c. 1892]-1929, to J. E. Griffith relating to botany and genealogy and to his publications.