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I regard it my pleasant duty to express to these two gentlemen my sincere thanks for their unremitting zeal in topographical and other work, and for their ever cheerful endurance of hardships under the most trying circumstances.

Respectfully,

W. H. Von Streeruwitz.

REPORT OF MR. THEO. B. COMSTOCK.

AUSTIN, TEXAS, December 31, 1891
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Hon. E. T. Dumble, State Geologist, Austin, Texas:

Sir—I have the honor to report that the field season of 1891, extending from May 25th to September 1st, was given by myself and party to the examination of the region south and southwest of San Angelo as far as the Rio Grande at Del Rio and Eagle Pass, and northward and northwestward from Eagle Pass to a connection with my previous work in the Central Mineral Region. The district covered this year was very large, the lack of water and of food for stock being also a serious hindrance. The problems encountered were mostly of a different type from those of the complicated region to the east of this tract, but they are of such a nature as to render careful work a necessity. However, as the topographic field parties of the United States Geological Survey were at the time engaged in mapping the area, our work was confined to a somewhat narrow belt bordering the lines run for geologic sections.

The field party of 1891, was organized as below:

• Theo. B. Comstock, in charge.
• R. A. Thompson, topographer.
• F. S. Ellsworth, aid.
• Meade Goodloe, rodman.
• J. C. Hubbard, rodman.
• J. E. Whitley, cook.
• H. L. Warren, hostler.

The only change in this personnel was the withdrawal of H. L. Warren at Del Rio, early in July. All the other members remained to the end of the season and each performed his duty with credit and satisfaction.

During my absence in June and again in August, Mr. Thompson was left in charge of the field party. In the field, as topographer and as leader of the corps, as well as in the office work of plotting, he exhibited excellent traits and is deserving of especial mention for his