This collection contains agreements, letters and declarations relating to marriage settlements and property transactions carried out by the Glynnes (Glyn) and Wynnes (Wynn) of Glynllifon and John Glynne (fl. 1644-1669) in particular.
It also contains two poems, the first by Robert Williamson, A Welsh Ode on the Birth of the Honourable Heir of Glynllivon, on the birth of Thomas John Wynn (1840-1878), and a poem by Margaret Wynne Jones of Treiorwerth, Bodedern Anglesey to "Mr Wynn", dated 1929.
There is also material, including pedigrees, press cuttings and correspondence (some in Italian) between Ellen Glynn Wynn and others in 1895-1896, relating to Maria Stella Petronilla, second wife of Sir Thomas Wynn, the first baron Newborough.