Includes a file of letters and letter reports concerning travels in Baja California: H.B. Slater addressed to J.E. Blackman, Los Angeles, February 3, 1911; "Report of the Swiss Scientific Expedition to Lower California, Mexico", 1915?, by Dr. F. Erdrich; Same title, no date, no author; Report on the land and property of "The Chartered Company of Lower California" now owned by the "Magdalena Bay Improvement Company", March 1912, by H. Graham Paterson; "Magdalena Bay Lands", unsigned, no date.