Robert Green Ingersoll, pictured here sometime between 1865 and 1880.
His father, John Ingersoll, was a Congregationalist minister who was often at odds with his congregation, who would make trivial complaints against him. A church trial which took place while the elder Ingersoll was pastor of the Congregational Church at Madison, Ohio, when Robert was 9, resulted in him being forbidden to preach, though this was later reversed. The unjust treatment of his father is thought to have soured Robert’s opinion of Christianity.
Original daguerreotype from the Brady studio.