The series comprises papers deriving from John Griffith's trusteeship of Cadwallader Wynne's Voelas estate, 1712-1763, and John Wynne Griffith's trusteeship of Robert Watkin Wynne's Plasnewydd and Garthmeilio estates, 1783-1843.

The series comprises papers deriving from trusts involving John Wynne Griffith, [c. 1814] and 1827, and George Griffith, 1825-1879, for the administration of estates belonging to other families in Denbighshire and Flintshire.