Series I is comprised of typed carbon copies of Caldwell's letters to van Doren, dating from February 26, 1949 to March 20, 1969
Box 1 Folder 1
1949 February-1950 December
Box 1 Folder 2
1951 February-March
Box 1 Folder 3
1951 April-May
Box 1 Folder 4
1951 June-July
Box 1 Folder 5
1951 August-October
Box 1 Folder 6
1951 November-December
Box 1 Folder 7
1952 January-March
Box 2 Folder 1
1952 April-July
Box 2 Folder 2
1952 August-December
Box 2 Folder 3
1953 January-December
Box 2 Folder 4
1954 January-1955 December
Box 2 Folder 5
1956 January-November
Box 2 Folder 6
1957 January-December
Box 2 Folder 7
1958 February-1969 March