A prehistoric road discovered and used by Indians, Spaniards, United States Army units, and cattle drovers. It crossed the Llano Estacado from Gholson Spring (7 mi. E. of present-day Slaton), to Tahoka Lake (3 mi. S. of Wilson), then to Tobacco Creek, Big Spring, and the North Concho. Here passed many 17th century Spanish visitors: Father Salas, coming from New Mexico in 1629 on pleas of Jumano Indians to preach to them; Captains Hernan Martin and Diego del Castillo, exploring in 1650; Captain Diego de Guadalajara, seeking pearls and other treasure, in 1654. Incise on back: Historian - Dr. W. C. Holden Recorded Texas Historic Landmark - 1967