Mary Jones supported Rebecca and her older brother, Daniel, by running a school for young girls at No.

"[3] Although Jones was raised in the Anglican tradition, she showed an interest in the Quaker faith from twelve years old.

At sixteen years of age, Jones began the conversion process after hearing minister Catherine Peyton preach.

Despite ridicule and objection from family and friends, Jones became increasingly involved in the Quaker religion, becoming a regular speaker by 1758.

Between 1784 and 1788, Jones continued to travel England, Ireland, Scotland, and Wales, with English Quaker Christina Hustler.

Jones continued to preach in the Delaware Valley and New England, and regularly visited District families.