Hi Marvin,According to Jim Graves' work, "Brick Brands of the United States", There were two possible brick manufacturers which molded "TEXAS" into their brick.One is the "Abilene Brick Co" of Abilene, TX, and the other possibility is The "Texas Press Brick Co" of Ferris, TX.
The TEXAS brick was manufactured in Ferris TX from 1909 - 1925. Contact Charles Dart Ferris Texas
I have a brick stamped 1776 found in the Boston, MA. area.