Report on the manuscripts of the Marquess of Downshire, preserved at Easthampstead Park, Berks / 
Great Britain. - Royal Commission on Historical Manuscripts.
Purnell, E. K.
Hinds, A. B.
London, 
1924-1940.
Vol. 1. Papers of Sir William Trumbull. Vol. 2-4. Papers of William Trumbull the Elder.