Letter from Lafayette B. Mendel to Helen Mitchell, April 23, 1921. Letter from Helen S. Mitchell to Dr. J.H. Kellogg, April 25, 1921. Letter from J.H. Kellogg to Helen Mitchell, April 28, 1921. Letter from Helen Mitchell to J.H. Kellogg, May 4, 1, 1921 - 1936

Letter from Lafayette B. Mendel to Helen Mitchell, April 23, 1921. Letter from Helen S. Mitchell to Dr. J.H. Kellogg, April 25, 1921. Letter from J.H. Kellogg to Helen Mitchell, April 28, 1921. Letter from Helen Mitchell to J.H. Kellogg, May 4, 1921. Letter from J.H. Kellogg to Helen Mitchell, May 13, 1921. Letter from J.H. Kellogg to Helen Mitchell, May 20, 1921. Letter from J.H. Kellogg to Helen Mitchell, May 29, 1921. Letter from J.H. Kellogg to Helen Mitchell, June 14, 1921. Letter from Helen Mitchell to J.H. Kellogg, June 18, 1921. Letter from Helen Mitchell to Lenna Cooper, June 18, 1921. Letter from Lenna Cooper to Helen Mitchell, June 22, 1921. Letter from J.H. Kellogg to Helen Mitchell, July 6, 1921. Letter from Helen Mitchell to Lafayette Mendel, August 12, 1921. Letter from Lafayette Mendel to Helen Mitchell, August 17,1921. Letter from Lafayette Mendel to Helen Mitchell, Sept. 22, 1921. Letter from Helen Mitchell to Dr. Lafayette Mendel, reply to Sept. 22 letter, no date. Bill from Lafayette Mendel to Helen Mitchell for reprints, Jan. 13, 1922. Letter from Helen Mitchell to Lafayette Mendel, March 6, 1922. Letter from Lafayette Mendel to Helen Mitchell, March 9, 1922 Letter from Helen Mitchell to Lafayette Mendel, March 11, 1922 Letter from Lafayette Mendel to Helen Mitchell, March 13, 1922. Letter from Helen Mitchell to Lafayette Mendel, March 15, 1922 (partial copy) Letter from Helen Mitchell to Lafayette Mendel, March 15, 1922 (complete original) Letter from Helen Mitchell to Lafayette Mendel, May 9, 1922. Letter from Helen Mitchell to Lafayette Mendel, June 24, 1922. Letter from Lafayette Mendel to Helen Mitchell, June 27, 1922. Letter from Helen Mitchell to Lafayette Mendel, Oct. 2, 1922. Letter from Lafayette Mendel to Helen Mitchell, January 24, 1923. Letter from Helen Mitchell to Lafayette Mendel, March 5, 1923. Letter from Helen Mitchell to Lafayette Mendel, March 12, 1923. Letter from Lafayette Mendel to Helen Mitchell, March 12, 1923. Letter from Lafayette Mendel to Helen Mitchell, March 15, 1923. Letter from Helen Mitchell to Lafayette Mendel, March 20, 1923. Letter from Helen Mitchell to Lafayette Mendel, August 10, 1923. Letter from Lafayette Mendel to Helen Mitchell, August 16, 1923. Letter from Lafayette Mendel to Helen Mitchell, Dec. 1, 1923. Letter from Helen Mitchell to Lafayette Mendel, Dec. 3, 1923. Letter from Lafayette Mendel to Helen Mitchell, Dec. 10, 1923. Letter from Helen Mitchell to Lafayette Mendel, Feb. 23, 1924. Letter from Lafayette to Helen Mitchell, Feb. 25, 1924. Letter from Helen Mitchell to Lafayette Mendel, Sept 26, 1924. Letter from Helen Mitchell to Lafayette Mendel, Dec. 9, 1924 Letter from Lafayette Mendel to Helen Mitchell, Dec. 13, 1924. Letter from Lafayette Mendel to Helen Mitchell, Aug. 27, 1925. Letter from Helen Mitchell to Lafayette Mendel, Sept. 17, 1925. Letter from Lafayette Mendel to Helen Mitchell, Sept. 21, 1925. Letter from Lafayette Mendel to Helen Mitchell, Nov. 2, 1925. Letter from Helen Mitchell to Lafayette Mendel Nov. 6, 1925. Letter from Helen Mitchell to Lafayette Mendel Jan. 16, 1926. Letter from Lafayette Mendel to Helen Mitchell, Jan. 22, 1926. Letter from Helen Mitchell to Lafayette Mendel Nov. 6, 1925. Letter from Helen Mitchell to Lafayette Mendel, March 6, 1927. Letter from Lafayette Mendel to Helen Mitchell, March 11, 1927. Letter from Lafayette Mendel to Helen Mitchell, March 22, 1927. Letter from Helen Mitchell to Lafayette Mendel, March 29, 1927. Letter from Helen Mitchell to Lafayette Mendel, March 14, 1928. Letter from Lafayette Mendel to Helen Mitchell, March 17, 1928. Letter from Helen Mitchell to Lafayette Mendel, March 19, 1928. Letter from Lafayette Mendel to Helen Mitchell, Nov. 26, 1928. Letter from Helen Mitchell to Lafayette Mendel, Nov. 28, 1928. Letter from Lafayette Mendel to Helen Mitchell, Dec. 1, 1928. Letter from Helen Mitchell to Lafayette Mendel, Nov. 11, 1929 Letter from Lafayette Mendel to Helen Mitchell, Nov. 16, 1929 Letter from Helen Mitchell to Lafayette Mendel, Jan. 20, 1930 Letter from Helen Mitchell to lafayette Mendel, Jan. 21, 1930. Letter from Lafayette Mendel to Helen Mitchell, Jan. 21, 1930. Letter from Lafayette Mendel to Helen Mitchell, Jan. 23, 1930. Letter from Helen Mitchell to Lafayette Mendel , Jan. 28, 1933. Letter from Lafayette Mendel to Helen Mitchell, June 28, 1933. Letter from Helen Mitchell to S.V. Sanford, July 17, 1933. Letter from Helen Mitchell to S.V. Sanford, July 1, 1933. Letter from Helen Mitchell to Lafayette Mendel, Jan. 9, 1934. Letter from Lafayette Mendel to Helen Mitchell, Jan. 15, 1934. Letter from Helen Mitchell to Lafayette Mendel, Jan. 22, 1934. Letter from Helen Mitchell to Lafayette Mendel , June 4, 1934 Letter from Lafayette Mendel to Helen Mitchell, June 18, 1934. Letter from Lafayette Mendel to Helen Mitchell, Nov. 1, 1934. Letter from Helen Mitchell to Lafayette Mendel, May 27, 1935. Letter from Helen Mitchell to Dept. of Health, New Haven, CT. Jan. 6, 1936.