 Daniel Parker's son, Dickerson Parker, was a veteran of the Battle of San Jacinto.Elder Parker was one of the earlier ministers to speak out against the "missions" movement.In 1820, while living in Vincennes, Indiana, he released a booklet entitled ""A Public Address to the Baptist Society, and Friends of Religion in General, on the Principle and Practice of the Baptist Board of Foreign Missions for the United States of America"."