Parker, Theodore, an American preacher and lecturer; adopted and professed the Unitarian creed, but discarded it, like Emerson, for a still more liberal; distinguished himself in the propagation of it by his lectures as well as his writings; was a vigorous anti-slavery agitator, and in general a champion of freedom; died at Florence while on a tour for his health (1810‒1860).
Definition taken from The Nuttall Encyclopædia, edited by the Reverend James Wood (1907)
Parker, Matthew * Parkman, Francis