Topographical, historical, and genealogical material relating mainly to the counties of Anglesey, Caernarvon, Denbigh, Merioneth, Montgomery, and Shropshire, accumulated by Thomas Pennant and including letters or other contributions from Paul Panton, Hugh Davies (botanist), E. R. Owen (Bangor), John Thomas (Llandegai and Beaumaris), John Lloyd (Caerwys), Sir John Cullum (Hardwick), Richard Thomas (Llanegryn), Thomas Bownall (London), Thomas Jones (Caernarvon), George Ashby (Cambridge), John Price (Oxford), Thomas Ford Hill (London), Foote Gower (Chelmsford), Francis Leighton (Shrewsbury), J. Plymley (junior), J. Worthington (Llanrhaiadr ym Mochnant), Thomas Addenbrooke (Buildwas), David Pennant, and Richard Gough (Enfield).