The collection includes approximately .75 cubic feet of original correspondence, mostly to Whittier 1829-1890, undated, approximately .5 cubic ft. of typed transcripts of the same, about 20 folders of Whittier’s poems, writings, biographical material, memorials, correspondence by JGW, 1835-1889, and miscellaneous, 1840-1892, undated. Of particular note are correspondence with Charles A. Dana, Ralph W. Emerson, Oliver W. Holmes, Lydia Maria Child, Dorothea Dix, Henry W. Longfellow, Henry B. Stanton, and Frances E. Willard regarding poems and abolition. There are also 10 letters to Whittier from his brother, Matthew F. Whittier and several letters from Elizabeth Whittier (?) and other relatives. Signatures are listed as signed. There is also an incomplete item-level index in Box 3.
The collection is also available on one reel of positive microfilm Acc#443 and the index is available on positive microfilm Acc#359 (section 2). The Clarke also houses books and poems by or about Whittier.