Mr. A. T. Jackson, in his extensive report on picture-writing of Texas Indians, calls attention to twenty-three square-shouldered human figures found in the course of his survey. According to the report, thirteen Texas counties and one New Mexico county possessed this type of figure. It is mentioned that several hundred miles separate the Texas sites from the typical Southwestern culture with which they appear to be linked. The farthest east that pictographs have been found is Concho County, Texas.

In March, 1939, the writer published a report on a prehistoric rock-shelter site in Pontotoc County, Oklahoma. The most outstanding feature at this site was a squareshouldered figure in one of twenty pictographs which adorn the shelter walls. It is likewise the best preserved of the group. It was suggested in the report that a Southwestern influence was responsible for the figure. Five hundred miles separate the Pontotoc County site from Concho County.