A collection of letters, 1742-1786, mainly to John Williams, agent to the Duke of Ancaster's estate at Gwydir, from John Ellis, Thomas Ellis, Robert Hughes, William Hughes, Robert Lloyd, D. W. Linden, L. Meyricke, Robert Myddelton, J. Parker, Thomas Patton, John Spranger and C. Wilmot. Also included are drafts and copies of letters by John Williams, transcripts of documents relating to the Llanrwst free school (cf NLW MS 470E) and memoirs of the Gwydir family, together with notes on books, Latin exercises and poetry.