An address (in Welsh) presented to the Society on the occasion of its Bicentenary in 1951 by the London Welsh Association (original copy), and one colour print of the Loyal Address presented by the Society to Her Majesty the Queen on the occasion of her Silver Jubilee, 1977.

Papers relating to the annual Cymmrodorion Dinner, the Bicentenary Celebration Dinner of the Cymmrodorion in 1951, and to the annual 'Conversazione'.