Correspondence, documents, and manuscripts, 1818, Nov. 24-1852, Dec. 17 (HLG 1-77)
Correspondence, documents, and manuscripts, 1853, Jan. 13-1856, Feb. 15 (HLG 78-151)
Correspondence, documents, and manuscripts, 1856, Sep. 27-1857-, Dec. 23 (HLG 152-231)
Correspondence, documents, and manuscripts, 1858, Jan. 2-1859, Feb. 28 (HLG 232-313)
Correspondence, documents, and manuscripts, 1859, Mar. 3-1860, Sep. 3 (HLG 314-383)
HLG 342 [Williston, Edward Bancroft, 1837-1920]. Letter to [José] Matías Moreno (1859, Nov. 9)
HLG 348 Cota, Leonardo, 1816-1887. Letter to [José] Matías Moreno (1860, Jan. 7)
Correspondence, documents, and manuscripts, 1860, Sep. 7-1861, Aug. 1 (HLG 384-453)
Correspondence, documents, and manuscripts, 1861, Aug. 1-1862, Apr. 1 (HLG 454-523)
HLG 492 Crosthwaite, Philip, 1825-1903. Letter to José Matías Moreno (1861, Dec. 20)
Correspondence, documents, and manuscripts, 1862, Apr. 2-17-1863, Oct. 31 (HLG 524-594)
Correspondence, documents, and manuscripts, 1863, Nov. 4-1865, Feb. (HLG 595-656)
Correspondence, documents, and manuscripts, 1865, Mar. 23-1866, Nov. 4 (HLG 657-720)
Correspondence, documents, and manuscripts, 1866, Nov. 24-1867, Sep. 24 (HLG 721-789)
Correspondence, documents, and manuscripts, 1866, Nov. 24-1868, July 3 (HLG 790-861)
Correspondence, documents, and manuscripts, 1868, July 9-[1871, May] (HLG 862-930)
Correspondence, documents, and manuscripts, 1871, June 2-1882 (HLG 931-994)
Correspondence, documents, and manuscripts, 1883, June 23-1931 (HLG 995-1022)
Additional correspondence, documents, and manuscripts, 1843, Apr. 21 - [undated] (HLG 1023-1060)
Correspondence, documents, and manuscripts [unidentified and/or undated]
Papers regarding Rancho Guadalupe (1880s-1948)
Flower family genealogy and photographs (1880s-1948)
United States. Department of the Interior: Correspondence and Documents (1911-1974)
Oversize correspondence, documents, and manuscripts, 1845, May 10-1857, Dec. 2 (HLG 1061-1078)
Oversize correspondence, documents, and manuscripts, 1858, Feb. 16 and 21-1861, Sep. 6 (HLG 1079-1096)
Oversize correspondence, documents, and manuscripts, 1861, Nov. 27-1867, June 8 (HLG 1097-1114)
Oversize correspondence, documents, and manuscripts, 186[7], Nov. 17-[undated] (HLG 1115-1132)