Waldo, Horatio a Presbyterian minister, was a native of Coventry, Conn. He graduated at Williams College in 1804; was a tutor in the college in 1806-7; settled as pastor of the Church in Griswold, Conn., in 1810; resigned his pastoral charge in 1830; and removed to Portage, N.Y., where he died in 1846, aged sixty-nine. See Sprague, Annals of the Amer. Pulpit. 4:630.