Comprises: Folder 1: 'U[nited] S[tates] Correspondence', letters, mainly relating to a visit to Washington in Jul-Aug 1974 to lecture on manuscripts and libraries in 15th century Italy at a conference organised by the Catholic University of America's Medieval and Byzantine Studies Program, and to other cities to investigate Renaissance manuscripts held in various libraries, 1967-1977 Folder 2: correspondence and papers relating to matters including requests to de la Mare…