Father Earl joined Mission of the Sacred Heart in order to become a missionary priest. His first mission was in Papua New Guinea, where he founded several missions, and his friend Father Brown was ordained a native priest, who later became a cardinal in Polynesia. In 1990, he went to the Soboba reservation to form the Indigenous Catholic mission with six tribes under the Diocese of San Bernardino.
The order, which was called Mission of the Sacred Heart, located in Pennsylvania, has an author who is writing a book on the two missions and the history of the set up of the churches. As in the beginning of the missions, the traveling priest still visits the parishes and the six reservations. Some of the book may include the early 1960 missions where a priest driving a pickup truck would set up the altar on the tailgate because there was no church. He would teach the people about this faith and adapt it to their tribe.
The six Reservation communities served by Father Henley as part of the Mission of the Sacred Heart in the Diocese of San Bernardino,
