The original correspondence of Robert Monckton is contained in one volume and, while it coversthe period 1751-83, the greatest number of letters concern events in North America and Canada,1755-1763. Many are from the most influential men engaged in the war with France at that time,including General James Abercromby, William Pitt and Major General James Wolfe. There is also asection containing photocopies of personal letters from Robert Monckton to his brother Jack, dated1762-1763. The originals of these are in the National Archives of Canada.
There is little material concerning Monckton's life after his return to Berwick.