Bound typescript, in blue cloth, by A.L. Sonderegger, 47 pp with table of contents and maps bound in, a cover letter from A.L. Sonderegger to O'Melveny, Tuller & Myers, Attorneys-at-Law (1938) with notes "this report is supplementary to my 'Report on Rancho Boundaries at Long Beach Harbor,' dated November, 1937, and includes all the maps bearing on these subjects not previously submitted."

Typescript discussion of Rancho San Pedro and Rancho Los Cerritos land grants, including surveys 1855-1938, with bound in Exhibits A-J and Plates 1-15:

Exhibit A. "Decree of confirmation, Manuel Dominguez &al vs. the United States," typescript (1854)

Exhibit B. "Opinion of the board delivered by Commissioner Hiland Hall, Juan Temple vs. the United States," "Juan Temple claimaint, decree of confirmation," typescripts (1853)

Exhibit C. "Quit claim of Rancho San Pedro to any lands on the east side of San Gabriel River," typescript (1856)

Exhibit D. "Quit claim of Rancho Los Cerritos (John Temple) to any lands on west side of the San Gabriel River," typescript (1856)

Exhibit E. "Instructions to the Surveyors General of public lands," typescript and positive photostat (1855)

Exhibit F. Correspondence from John Wilson (Commissioner of General Land Office) to Samuel D. King (Surveyor General of California) re surveying of swamp and overflowed lands, typescript (1853)

Exhibit G. "Hancock field notes - 1856 - Rancho Los Cerritos," typescript

Exhibit H. "Patent survey of Rancho San Pedro, original field notes of George Hansen, 1855," "Field notes of the final survey of the Rancho San Pedro situated in the county of Los Angeles, California, and confirmed to Don Manuel Dominguez, et al., pursuant to instructions issued by J.W. Mandeville, Surveyor General of the Unied States for the State of California . . . by Henry Hancock, Deputy Surveyor," typescript with two positive photostats (1855, 1857)

Exhibit I. "Survey of eastern boundary of Rancho San Pedro, field notes of A Solano, June-July, 1877, made at the request of Manuel Dominguez, Solano field book, 1877-8," "Tablings of meander lines, Rancho San Pedro eastern boundary, G. Hansen and A. Solano, June-July 1877, Survey made at requet of Manuel Dominguez, R.E. Rodriguez v. Pedro A. Dominguez," "Survey of eastern boundary of Rancho San Pedro, G. Hansen & A. Solano, June-July 1877, made at the request of Manuel Dominguez," typescript

Exhibit J. "Compromise boundary line, field notes of G Hansen and A Solano, June-July, 1884," "Compromise boundary line, field notes of G. Hansen and A. Solano, July-August, 1884," typescript with positive photostat

Plate 1. "Map of the Rancho San Pedro finally confirmed to Manuel Dominguez, et al," Henry Hancock, positive photostat (1868)

Plate 2. "Map of Rancho San Pedro, situated in the County of Los Angeles, California, confirmed by Manuel Dominguez et al and at his request surveyed in conformity with instructions of Col. J.C. Hayes, US Surveyor General for the State of California of date Feb 9th 1855 by Henry Hancock, US Dep Surveyor," Henry Hancock, blueline print showing subdivision lines of 1856 (1877)

Plate 3. "1855-1857 replat of the field notes of patent lines of Rancho San Pedro and Rancho Los Cerritos, from original field notes and copy of same furnished by US Land Office and from recorded patent survey," A.L. Sonderegger, blueprint (1938)

Plate 3-A. "Mouth of San Gabriel River from fieldbook notes of survey of Rancho Los Cerritos by Henry Hancock in 1856," A.L. Sonderegger, blueprint (1938)

Plate 4. "Plat of survey of Inner Bay of San Pedro from field books, official field notes and description in patent, 1856-1857," A.L. Sonderegger (1938)

Plate 5. "Plat of the compromise line between the Ranchos Los Cerritos and San Pedro," Charles T. Healey, two positive photostats with manuscript blue and green pencil (1904)

Plate 6. "Replat of a portion of sheet no. 2 of 'plat of the compromise line between the Ranchos Los Cerritos and San Pedro,' by Charles T. Healey, licensed surveyor," A.L. Songeregger, blueline print (1938)

Plate 7. "Replat of a portion of Los Angeles County Surveyor's survey no. 51, of the San Gabriel River, Nov. 1, 1893 to Jan. 17, 1894, by J.A. Bernal," A.L. Sonderegger, blueprint (1938)

Plate 8. "SPLA&SLRR, Map showing compromise line between Ranchos Los Cerritos & San Pedro at the mouth of the San Gabriel River and lands transferred and quitclaimed between the Seaside Water Co. and the San Pedro Los Angeles and Sal Lake RR Co," E.M. Jessup, blueline print (1905)

Plate 9. "1906 topographic map of San Gabriel River," A.L. Sonderegger, blueline print (1938)

Plate 10. "City of Long Beach report on San Gabriel River cross sections of San Gabriel River," A.L. Sonderegger, blueline print showing mean tide levels at eight cross section locations along San Gabriel River, including Anaheim Road Bridge and SPRR Trustle [sic] Bridge (1906)

Plate 11. "Survey of Old San Gabriel River, March 1938" G.N. Adams and A.L. Sonderegger, blueline print showing mean high water and lower low water levels at five cross sections, including Southern Pacific Trestle (1938)

Plate 12. "Ties to compromise line station 'Y,' established 1905 to 1910," A.L. Sonderegger, blueline print (1938)

Plate 13. "Ranchos San Pedro and Los Cerritos patent lines and compromise lines, calls and coordinates," A.L. Sonderegger, blueline print (1938)

Plate 14. USGS Quadrangle "California, Los Angeles County, Wilmington Quadrangle," USGS at a scale of 1:24000, 5 ft contour interval (1931 print of 1925 map)

Plate 15. "Map of that portion of the Rancho San Pedro in the county of Los Angeles, California, which was allotted to Manuel Dominguez . . ." blueline print showing 1885 land parcels with owners' names (1938)