A letter from Ongley appears in the April 1874 issue of Bible Examiner. It shows him to be sharing a ministry with C. F. Sweet. Sweet in turn was a friend of Owen Russell Croizer and both were known to Barbour.
The letter, signed by both Sweet and Ongley, shows that they were engaged in a tent ministry in Pennsylvania and New York. They had just published two pamphlets written by Sweet. Sweets and Ongley also associated with William Spencer of Rochester who also comes in for mention in Nelson Barbour: The Millennium’s Forgotten Prophet.