Frederick William Peabody (1862-1938) was born and died in Brooklyn, New York. He married Anna M. Greenough in Boston, Massachusetts, in 1894. They divorced in 1908, and Peabody later married Frances R. Bliss in 1910. He graduated from Columbia Law School in 1888 and worked for the firm Peabody, Baker & Peabody. Peabody represented Josephine Curtis Woodbury in an unsuccessful libel lawsuit brought against Mary Baker Eddy in 1899. It was dismissed in 1901. Afterwards, he gave a lecture at Tremont Temple in Boston on August 1, 1901, titled, "An Exposure of Eddyism" which was printed into a pamphlet, "A Complete Exposure of Eddyism or Christian Science, and the Plain Truth Regarding Mary Baker G. Eddy, Founder of Christian Science." He later represented Eddy's sons, George Washington Glover and Ebenezer J. Foster Eddy, in the "Next Friends" lawsuit of 1907. Peabody retired from practicing law in 1912. He authored The Religio-Medical Masquerade: A Complete Exposure of Christian Science (1910) and, along with Woodbridge Riley and Charles E. Humiston, co-authored The Faith, the Falsity and the Failure of Christian Science (1925). In 1926, he made a plea to President Calvin Coolidge for total cancellation of the World War I obligations of the Allies to the United States. The following year, he organized the American Association Favoring Reconsideration of the War Debts, Inc. in Ashburnham, Massachusetts, and remained its managing director until his death.

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