Miscellaneous administrative papers of the Caernarfonshire and Merionethshire estates of Clenennau, Glyn, Sylfaen and Ystumcegid, concerning crop and livestock husbandry [17 cent., first ½], 1662, [mid 18 cent.], property repairs, [1678x-1705]-1857, surveys and valuations, 1705-[1815x1860], mines and quarries, 1726-1853, enclosures and embankments, 1806-1830, tithes, [c. 1836] and game, 1885-1902.