General Map of Explorations and Surveys in California made under the direction of the Hon. Jefferson Davis, Secretary of War by Lieut. R.S. Williamson, Topogl. Engr. assisted by Lieut. J.G. Parke, Topl. Engr. and Mr. Isaac Williams Smith, Civ. Engr. 1853. Explorations and Surveys for a Rail Road Route from the Mississippi River to the Pacific Ocean. War Department. Routes in California to connect with the routes near the 32nd and 35th parallels. Engr. by Selmar Siebert.

A north/south view of California from the San Francisco Bay to San Diego. The railway line is shown extending as far east as Fort Yuma. Without color.
This Quarto issue of the report is the House issue, except for volume XI which is the Senate issue. W. Heckrotte has an unusual copy of the Warren U.S. map found in this report. It is dissected on linen and is an earlier version of the map published with the Quarto report. It has 40 authorities vs. 42 in the quarto issue map, shorter note to left of authorities, lots of plate differences, especially: nothing in Owyhee area, differences in N.M., Calif., etc. Looks like someone asked for the map before it was finished -see the Lack of ocean lines in the top half south of Gray's Harbor. In 13 volumes. Bound in full leather with "Explorations and Surveys for a Railroad to the Pacific Ocean" and the volume number on the spine in gold.
WC 262.