92 THE UNIVERSITY OF OKLAHOMA 



•nchcs square. At the top was a letter U, at the right the letter 

 G, at the bottom the letter S, and at the left the letter' S. In the 

 middle was a cross or X. We did not know what it could mean. 

 I studied and studied over the matter, and one night, I woke up 

 and the thing came to me like a flash." Taking a stick he drew 

 a diagram on the ground and pointing to the letters, spelled out this 

 message : — 



■'U — Go — South — Ten — Steps." And they went south ten 

 steps and that is where they dug the hole hunting for the hidden 

 treasure. 



XLIV. THE WEBBERS FALLS "TRAP DYKE" AS A 

 SOURCE OF MATERIAL FOR PRIMITIVE IMPLE- 

 MENT MAKERS 

 Joseph B. Thoburn 

 Oklahoma City, Oklahoma 

 When the first collection of prehistoric stone implements, toois 

 and weapons was brought to the University of Oklahoma from Mus- 

 kogee County, in the latter part of 1913, there was included in it 

 a number double-bitted hoes and celts which had been fashioned 

 from a very hard rock, nearly black in color, which flaked like 

 flint or chert, though much more coarsely and with a rough-surfaced 

 fracture somewhat like that of limestone. In showing the collection 

 to Dr. D. W. O'Hearn, then director of the Oklahoma Geological 

 Survey, his curiosity was aroused and he asked to be permitted to 

 examine one of the implements. Trying it with his knife blade and 

 finding it very hard, he remarked that it seemed to be like trap 

 rock and expressed surprise that rock of such a character should 

 be so commonly used in such a quarter. Inasmuch as the collection 

 above mentioned had been gathered in the vicinity of Webber Falls, 

 the thought instantly occurred to me that possiblj' this material had 

 l)een secured from the ledge which causes the riffle or rapid in 

 the Arkansas River and which has long been known as Webber 

 Falls. Subsequent inquiry and investigation revealed the fact that 

 implements ■ and other artifacts made from this material were of 

 more or less common occurrence over a wide scope of country, 

 extending as far north as the Kansas-Oklahoma boundary line, as 

 far south as Fort Smith, Arkansas, and as far west as Oklahoma 

 City. 



The material seemed to be peculiarly adapted to the varied uses 

 of the stone age man as it readily lent itself to fashioning by any 

 of the three methods — rpecking, flaking and grinding or polishing. It 

 is hard, though not so hard as chert. On the other hand it also 



