Williston Walker was born in Portland, Maine, July 1, 1860, the son of a distinguished Congregational minister. He received his A. B. degree from Amherst College in 1883, was graduated from Hartford Theological Seminary in 1886 and received his Ph.D. degree from the University of Leipzig in 1888. He succeeded Woodrow Wilson as associate professor of history at Bryn Mawr College. He later taught church history at Hartford Theological Seminary. In 1901 Yale University called him to succeed George Park Fisher as Titus Street Professor of Ecclesiastical History, a position which he held until his death in 1922. The Reformation, Ten New England Leaders, Great Men of the Christian Church, and A History of the Christian Church are among his distinguished works.