From the 1884 edition of Burke's General Armory, the arms of Sir Hugh of Padina through the Hustons of Wigton/Wigtonshire to John Huston, Gentleman, immigrant ancestor of Sam Houston.
Shield:  Or, a chevron chequy Sable and Argent betwixt three martlets Sable.
Crest:  A sandglass Proper.
Supporters:  Two greyhounds Proper collared and chained Or.
Motto:  In Time

A simplified version of these arms is used by the University of Houston
"Heraldry in the Republic of Texas Era of the United States of America" by Mrs. Harry Joseph Morris
Glasshouse