•
Ten Discourses on Orthodoxy (1849) •
Hebrew Men and Times (to the Christian era), (Boston, 1861) •
Manual Latin Grammar (1868) •
A Latin Reader (with his brother
William Francis Allen; 1869) •
A Latin Primer (1870) •
Our Liberal Movement in Theology, chiefly as Shown in Recollections of the History of Unitarianism in New England (1882) •
Christian History in its Three Great Periods, (1) Early Christianity, (2) The Middle Age, (3) Modern Phases (three volumes, 1882–83) •
Historical Sketch of the Unitarian Movement since the Reformation, (New York, 1894). Latin manuals he prepared with
James B. Greenough were familiar to high school students. ==References==