Eight autograph letters, one written and signed by William Carlos Williams to Charlotte Wilson commenting positively on a poem she wrote, five letters from Williams's wife, Florence, to Wilson, and two letters from Kay Boyle to Wilson, dated from December 3, 1957 to November 1, 1961.

The William Carlos Williams collection, spanning the dates 1916-1973, consists of sixty-nine letters from noted American poet William Carlos Williams (1883-1963) to several different individuals discussing a variety of issues and reflecting his relationship to the various recipients. Letters from Florence Williams (wife of William Carlos) to several of these individuals, several letters written by Fred Miller, and manuscripts by Williams and Miller also comprise the collection.