[April, 1957], Typed Letter (copy), 1 page, Syracuse, Italy, from Isaiah Berlin.

August 12, 1957, Typed Letter (copy), 1 page, London, England, from St. Clair McKelway.

November 26, 1957, Typed Excerpt (copy), 1 page, from Tania Jepson.

February 18, 1958, Typed Excerpts (by SNB), 2 pages, from Elisabeth Beerbohm.

March 4, 1958, Typed Excerpt (copy), 1 page, London, England, from Tania Jepson.

February 19, 1958, Typed Excerpts (by SNB), 1 page, from Tania Jepson.

June 18, 1958, Typed Letter (copy), 3 pages, from George Sidney.

June 30, 1958, Typed Excerpts, 1 page, from Tania Jepson.

March 21, 1959, Typed Letter Signed, 1 page, Cambridge, Massachusetts, from William A. Jackson.

April 19, 1959, Typed Excerpts (by SNB), 1 page, from Tania Jepson.

February 9, 1960, Typed Letter (carbon), 1 page, from Tania Jepson.

February 10, 1960, Typed Letter Signed, 3 pages, New York, from Margaret Cousins.

February 14, 1960, Typed Letter (copy), 1 page, from Dudley Fitts.

March 7, 1960, Autograph Postcard Signed, 1 page, Cambridge, Massachusetts, from Edmund Wilson.

[May, 1960], Autograph Letter Signed, 2 pages, London, England, from Sir John Foster.

May 19, 1960, Typed Letter (copy), 2 pages, [London, England], from Eva G. Reichmann.

August 12, 1960, Typed Letter Signed, 1 page, Rapallo, Italy, from Dr. G. Bacigalupo.

January 8, 1962, Typed Letter (copy), 1 page, Cambridge, Massachusetts, from Isaiah Berlin.

February 16, 1962, Typed Letter Signed, 1 page, New York, from Carol Brandt.

April 12, 1962, Typed Letter Signed, 1 page, New York, from Carol Brandt.

July 16, 1963, Typed Letter Signed, 1 page, Beverly Hills, California, from [Fred Kohlmar].

October 23, 1965, Typed & Autography Letter Signed, 3 pages, Brooklin, Maine, from Katharine White.

May 6, 1969, Typed Letter Signed, 1 page, New York, from Robert Lantz.

March 18, 1971, Typed Letter Signed, 1 page, Washington, D.C., from John Walker.