A biosketch of Mary (Brown) Austin reports :
The writer of the letter given below, Mary, widow of Moses, and mother of Stephen F. Austin, had a remarkable life and was descended from remarkable people. She was born January 1,1768, at Sharpsborough Upper Forge (one of the iron mines of her grandfather Sharp) in the mountains of New Jersey; married (September 28, 1785, in Christ Church, Philadelphia—where her grandmother and great-grandmother had been married before Her) Moses Austin, of Durham, Connecticut, and went with him to Richmond, Virginia, thence to the lead mines in the wilderness of Wythe county, and finally, in 1798, to Missouri, where she lived until her death—January 8, 1824—with the exception of about eighteen months spent among her relatives in the East while her daughter was in school in New York. The letters she wrote her husband during this time are most interesting.
 "A letter from Mary [Mrs. Moses] Austin." Southwestern Historical Quarterly 10 (1906), 343, [GoogleBooks], [HathiTrust].