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Fosdick. Harry Emerson. New York. 27 Jan 1953. To Adele C. Brockhoff. t.l.s. 1p. (with t.copy of letter from Helen Keller to Fosdick. 18 Feb 1953. and t.copy of his reply, 27 Feb 1953)
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Hemingway. Patrick M. and Henriette Broyles Hemingway (Mrs. Patrick M.) East Africa [ca.1952) To Adele C. Brockhoff. a.l.s. (in the hand of Mrs. Hemingway)
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Hemingway. Pauline Pfeitter (Mrs. Ernest) Key West, Fla., 2 June 1951 & [n.d.], To Adele C. Brockhoff, 1 a.l.s., 3 t.l.s., June 1951
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Keller, Helen. Seattle. 27 May 1946. To Gustevus A. Pfeitter. t.l.s., 2p.
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Keller, Helen. Westport. Conn. 1949 -1957. To Adela C. Brockhoff. a.1.s., 7 t.l.s., 1949
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Keller, Helen. [Westport. Conn.] Christmas 1949 -1950. To [Adela C. Brockhoff) 2 p.c.s. (2 Christmas cards, signed by Miss Keller and Polly Thompson), 1949
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Nixon. Patricia Ryan (Mrs Richard N.) Washington, 12 July 1972. To Adela C. Brockhoff t.l.s, 1p. (with envelope)
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Reagan, Nancy (Mrs Ronald) Washington, 16 November 1981. To Adela C. Brockhoff t.l.s., 1p.
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Thompson, Polly. Westport, Conn., 1952 - 1957 & n.d. To Adele C. Brockhoff a.1.s. (written on behalf and signed for Helen Keller and herself), 1952, 1957, n.d.
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Thompson, Polly. n.p., n.d. To Adele C. Brockhoff. a.l.s., 1.p. (With envelope; removed from Helen Keller, My Religion, 1927), n.d.
Braddy, Nella. Anne Sullivan Macy: the story behind Helen Keller. Garden City: Doubleday, 1934. Inscribed to Adele C. Brockhoff abd signed by Helen Keller, Anne Sullivan and Polly Thomson
Hemingway, Ernest. For whom the bell tolls. New York: Scribner's, 1940. First edition, first printing. Inscribed to Adele C. Brockhoff and signed by the author
-------. Winner take nothing. New York: Seribner's, 1933. Signed by the author.
Keller, Helen. Let us have faith. New York: Doubleday, 1940. First edition. Inscribed to Adele C. Brockhoff and signed by the author. Dec 1940. With a.n. to Miss Brockhoff by Gustavus A. Pfeifter, 28, July 1942
-------. My religion. Garden City: Doubleday, 1927
-------. Teacher: Anne Sullivan Macy. A tribute by the foster-child of her mind. Introduction by Nella Braddy Henney. Garden City: Doubleday, 1955. First edition.