XCV111 REPORTS OF GEOLOGISTS. 



made a careful exploration of a tract whicli we had previously been obliged 

 to neglect, devoting a week to its study. The results of this examination are 

 embodied in the main report. 



Again I must acknowledge the welcome interest taken by the citizens of my 

 district in our work, and the constant aid and encouragement rendered by 

 hundreds whose names it is impossible to give. There has not been one in- 

 stance of anything but courteous and generous treatment by all whom we 

 have encountered in several thousand miles of travel through the region. 



Allow me to assure you, personally, of my appreciation of all that you have 

 done to render light the burdens of a comprehensive Survey. No small share 

 of what has been accomplished is due to your unwavering support and indulg- 

 ent treatment in both the field and office. 



Very respectfully, 



THEO. B. COMSTOCK, 

 Geologist for Central Texas. 



REPORT OF MR. W. P. CUMMINS. 



Austin, Texas, December 31, 1890. 

 Hon. E. T. Dumble, State Geologist, Austin, Texas: 



Dear Sir — In compliance with your request I herewith hand you a report 

 of the field work done by myself and assistants since January 1, 1890. Pre- 

 vious reports have embraced the work done up to that date. When the pre- 

 vious report was written we were encamped at Dockum, in Dickens County, 

 at the foot of the Staked Plains. 



The weather turned very cold, my men got sick with "la grippe," and it 

 being impossible to get feed for the stock for some distance after leaving this 

 locality, I abandoned the project of making another complete section across 

 the Permian formation from this place, as I had intended. 



I made such observations in that vicinity as was possible without moving 

 camp, going in one instance up Blanco Canyon as far as the south line of 

 Floyd County. 



After supplying ourselves with provisions and feed for the stock we began 

 our return trip, going northeastward, crossing the head of the north fork of 

 of Croton Creek, to the head of the south fork of the Big Wichita River We 

 traveled down the north side of that stream to the old McKenzie trail. Cross- 

 ing the river at that place, we kept down the south side of the river to Ben- 

 jamin, the county seat of Knox County. This is the first place at which we 



