On January 16, 1827, he enlisted in a volunteer company organized by Hugh Blair Johnston. The unit marched to Nacogdoches to help quell the Fredonian Rebellion. Hardin represented the Liberty District at the Consultation in 1835 at Columbia and San Felipe de Austin, and again at the Convention of 1836 at Washington-on-the-Brazos, where he signed the Declaration of Independence. After the convention, Augustine was in charge of escorting the Hardin family members to Louisiana during the Runaway Scrape. After returning to Texas, he served in the Army of the Republic of Texas from July 7 to October 7, 1836.
Hardin married Maria Dever, on February 9, 1828, in Liberty. They had seven children, five of whom survived childhood. Maria died in Liberty County in 1844, and Augustine did not remarry. His son by his first marriage, Augustine B. Hardin, Jr., moved to Texas in 1839 and lived with his father before moving to Leon County, Texas. The elder Augustine was a Catholic, the only Hardin to practice the faith after the Texas Revolution. From 1836 until 1871 he spent the majority of his time in Liberty County with his ranching and agricultural operations. In 1849 he was one of the founders of the Liberty Masonic Lodge. He died in Liberty County at his daughter's house on July 22, 1871, and was buried in the Hardin family cemetery north of Liberty. In 1936 the Texas Centennial Commission placed monuments in his honor at his grave and on the Liberty County Courthouse square. Source
Note: The family cemetery is private and kept locked, but it lies on the shoulder of FM 1011 and can be viewed in its entirety from outside the gate.
30° 06.076, -094° 45.971
Hardin Family Cemetery