This is Part VII of the 21st Annual Report of the Geological Survey, produced under the direction of Charles Walcott. This volume, authored by Robert T. Hill, is focused on Texas and consists of five parts: Geography of the Texas Region; Geography of the Black and Grand Prairies and Cross Timbers; Geology of the Black and Grand Prairies; Artesian Waters of the Black and Grand Prairies; Artesian Conditions of the Black and Grand Prairies, by County.

Includes 666 pages of text , 7 large folding maps, 64 plates, and numerous in-text illustrations. The folding maps of primary interest include:

Map of the Black and Grand Prairies of Texas Including the Eastern and Western Cross Timbers (29 x 30.3"). Map covers east-central Texas including Austin, Dallas and Fort Worth. Provides excellent detail of topography, drainage, and railroads. Delineated by county and drawn on a scale of 10 miles per inch.

Geology of the Black and Grand Prairies of Texas Including the Eastern and Western Cross Timbers (29 x 30.3"). Depicts the geology of the region overlaid on top of the same topographical map as above. Identifies pleistocene, upper cretaceous, lower cretaceous and carboniferous rocks in vivid color.

The other folding maps show the artesian waters in the region, as well as a sheet containing cross sections of the prairies.

Hardbound in original brown cloth with embossed cover in gilt and spine with gilt title.

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Condition: A

The large folding maps are very good to near fine with occasional light toning along the folds. A few of the maps also have tiny splits at fold intersections. Text is lightly toned. Hinges are starting with light wear to covers.