Thomas Jefferson Farnham, Farnham's Travels in the Great Western Prairies…
“ As you approach the mountains, however, it becomes contracted within narrow limits over a gravelly bottom, and a swift, clear, and abundant stream. The waters of the Red River are so brackish when low, as to be unfit for common use.The Trinity River, the Brazos, and the Rio Colorado, have each a course of about twelve hundred miles, rising in the plains and mountains on the north and north-west side of Texas, and running south south-east into the Gulf of Mexico. ”
