The collection contains agricultural, mathematical, and personal notes; religious meditations; correspondence; and a few legal and business papers. There are also some papers of one of Power's sons, Holloway Bunyan Power, born in 1834 in Alabama. He also was a farmer, and upon his father's death on November 6, 1866, he succeeded him as a preacher for Bethany Baptist Church. Some of the records of the church are included with this collection.

John August Tubbe Sr. (1841-1918) was an immigrant from Prussia who settled in Nacogdoches County, Texas in 1856. August was a pastor and circuit rider for several east Texas Baptist churches, a member of the Nacogdoches Milam Lodge, a farmer on 160 acre tract, and a sawmill operator in Nacogdoches County.