APPENDIX D. 



DESCRirTION OF MAPS AND PROFILES, WITH TABLE OF LATITUDES. 



Map No. 1 comprises that portion of California lying west of the San Joaquin or Tulare val- 

 ley, between the Bay of San Francisco and the roadstead of San Pedro, together with the hasin 

 of the Mojave river. The entire coast line, with the exception of that portion lying between 

 Point San Luis and the mouth of the Santa Clara river, was obtained from the Coast Survey 

 chart, 1853. The geographical positions of the Picacho de Gavilan, Point Concepcion, and 

 Santa Barbara, were also obtained from Coast Survey determinations. The eastern limits of 

 the Coast Kange, and the positions of Tulare river and Buena Vista lakes, also a portion of the 

 Mojave valley, Los Angeles and San Bernadino plains, Santa Ana river, and the eastern and 

 western limits of the Sierra Nevada, were obtained from the surveys of the General Land OfBce. 

 The lower portion of the Mojave valley and the south end of Soda lake were taken from the sur- 

 veys of Capt. A. W. Whipple and Lieut. E. S. Williamson, U. S. Topographical Engineers. 



Map No. 2 comprises the combined results of the surveys of 1854 and 1855, from the 

 Pimas villages to the Eio Grande, at Fort Fillmore. The Kio Gila, from the Valle del Sauz, 

 eastward, was obtained from the reconnaissance of Major W. H. Emory, U. S. T. Eng's, 1846. 

 The remaining portion of the Gila, the positions of Fronteras, El Paso, Fort Fillmore, Sugar 

 Loaf (Peloncillo) camp, Dos Cabezas spring, (Puerto del Dado), mouth of Quercus caiion, San 

 Pedro springs, Tucson, Maricopa and Pimas villages, and mouth of the Salinas, (determined 

 by Captain A. W. Whipple, Topographical Engineers,) and all the topography in the 

 immediate vicinity of the recent boundary line between the United States and Mexico, were 

 furnished from the office of the Mexican Boundary Commission. The northern extremities 

 of all the mountains along this boundary line, from the 108° meridian to the San Luis 

 range, (Sierra de los Animos,) and the position of Sierra Santa Rita, were determined by 

 our own measurements, and on comparison were found to agree with the respective determina- 

 tions of these points by the Boundary Commission, Major W. H. Emory, commissioner, 1855. 



Sheet No. 3 comprises — 1st. A profile of the route near the 32d parallel, from the Pimas vil- 

 lages to the Rio Grande, at Fort Fillmore. 2d. A profile of the route from the Bay of San 

 Francisco to the plain of Los Angeles. 3d. A general profile, from the Red river, at Fulton, 

 to San Diego, California ; and 3d a. A continuation of this route to San Francisco, via San Gor- 

 gonio pass and Los Angeles. And 4th. A detailed survey of Warner's pass. Map Nos. 3 and 

 3a comprise the profiles of Capt. John Pope, U. S. T. E., 1854 ; Lieut. John G. Parke, U. S. 

 T. E., 1855, (32d parallel route); Charles H. Poole, esq., civil engineer; Lieut. R. T. Wil- 

 liamson, U. S. T. E.; and Lieut. J. G. Parke, Topographical Engineers, 1855, (California coast 

 route.) Profiles Nos. 3 and 3a are of the same scale, and are intended to illustrate the com- 

 parative lengths of the two routes, from Fort Yuma, Colorado river, to San Diego, and to San 

 Francisco bays, respectively. 



