Mariano Guadalupe Vallejo (1807–90) grew up in Spanish California, became a leading military and political figure in Mexican California, and participated in some of the founding events of U.S. California. In 1874–75, Vallejo, working with historian and publisher Hubert Howe Bancroft, composed a five-volume history of Alta California—a monumental work that would be the most complete eyewitness account of California before the gold rush. But Bancroft shelved the work, and it has lain in the archives until its recent publication as Recuerdos: Historical and Personal Remembrances Relating...