 "The History of Essex Hall", written in 1959 by Mortimer Rowe, the Secretary (i.e.chief executive) of the General Assembly of Unitarian and Free Christian Churches for its first twenty years, claims that the BFUA and AUA were founded entirely coincidentally on the same day, 26 May 1825.A third period ("see" Transcendentalism), from about 1835 to about 1885, profoundly influenced by German idealism, was increasingly rationalistic, though its theology was largely flavoured by mysticism.