There has been understandable confusion about use of the plural Californias by Spanish colonial authorities. California historian Theodore Hittell offered the following explanation:
In very early times, while the country was supposed to be an island or rather several islands, it was commonly known by the plural appellation of "Las Californias" (The Californias). Afterwards, when its peninsular character was ascertained, it was called simply California; but the territory so designated was unlimited in extent. When the expeditions for the settlement of San Diego and Monterey marched, it was understood that they were going, not out of California, but into a new part of it. The peninsula then began to be generally spoken of as Antigua or Old California and the unlimited remainder as Nueva or New California, subsequently more commonly called Alta or Upper California. At the same time the old plural name of The Californias was revived, but with a more definite signification than before.[5]
In 1767, the Jesuits were expelled from the missions, and Franciscans were brought in to take over. Gaspar de Portolá was appointed governor to supervise the transition. At the same time, a new visitador, José de Gálvez, was dispatched from Spain with authority to organize and expand the fledgling province.[6]
The more ambitious province name, Las Californias, was established by a joint dispatch to the King from Viceroy de Croix and visitador José de Gálvez, dated January 28, 1768. Gálvez sought to make a distinction between the Antigua ('old') area of established settlement and the Nueva ('new') unexplored areas to the north. At that time, almost all of the explored and settled areas of the province were around the former Jesuit missions, but, once exploration and settlement of the northern frontier began to intensify, the geographical designations Alta ('upper') and Baja ('lower') gained favor.
The single province was divided in 1804, into Alta California province and Baja California province.[7] By the time of the 1804 split, the Alta province had expanded to include coastal areas as far north as what is now the San Francisco Bay Area in the U.S. state of California. Expansion came through exploration and colonization expeditions led by Portolá (1769), his successor Pedro Fages (1770), Juan Bautista de Anza (1774–76), the Franciscan missionaries and others. Independent Mexico retained the division but demoted the former provinces to territories, due to populations too small for statehood.
Geography
The Baja California Peninsula is bordered on three sides by water, the Pacific Ocean (south and west) and Gulf of California (east); while Alta California had the Pacific Ocean on the west and deserts on the east. A northern boundary was established at the 42nd parallel by the Adams–Onís Treaty of 1819. That boundary line remains the northern boundary of the U.S. states of California, Nevada, and the western part of Utah.
Inland regions were mostly unexplored by the Spanish, leaving them generally outside the control of the colonial authorities. Mountain ranges of the Peninsular Ranges, eastern Transverse Ranges, and the Sierra Nevada, along with the arid Colorado Desert, Mojave Desert, and Great Basin Desert in their eastern rain shadows, served as natural barriers to Spanish settlement. The eastern border of upper Las Californias was never officially defined under either Spanish or subsequent Mexican rule.[8] The 1781 Instrucciones and government correspondence described Alta California ("Upper California") as the areas to the west of the Sierra Nevada and the lower part of the Colorado River in the Lower Colorado River Valley (the river forms the present day border between the states of California and Arizona).[9]
^Richman, I. B. (1965). California under Spain and Mexico, 1535–1847: A contribution toward the history of the Pacific coast of the United States, based on original sources, chiefly manuscript, in the Spanish and Mexican Archives and other repositories, pp.64–66. New York: Cooper Square Publishers.
^Bancroft, H. H. (1970). History of California: Vol. II, 1801–1824, pp.20–21. Santa Barbara Calif.: Wallace Hebberd. (Note: Bancroft translated the names of the two new provinces as "Antigua" and "Nueva", but Richman uses Baja and Alta - as on the 1847 map of Mexico.)
^José Bandini, in a note to Governor Echeandía or to his son Juan Bandini, a member of the Territorial Deputation (legislature), noted that Alta California was bounded "on the east, where the Government has not yet established the [exact] borderline, by either the Colorado River or the great Sierra (Sierra Nevada Range)". A Description of California in 1828 by José Bandini (Berkeley, Friends of the Bancroft Library, 1951), 3. Reprinted in Mexican California (New York, Arno Press, 1976). ISBN0-405-09538-4
^Chapman, Charles Edward (1973) [1916]. The Founding of Spanish California: The Northwestward Expansion of New Spain, 1687–1783. New York: Octagon Books. p. xiii.
Bouvier, Virginia Marie (2001). Women and the Conquest of California, 1542–1840: Codes of Silence. Tucson: University of Arizona. ISBN978-0-8165-2446-4.
María Luisa Rodríguez-Sala; Karina Neria (2003). Los gobernadores de las Californias, 1767–1804: contribuciones a la expansión territorial y del conocimiento (in Spanish). Instituto de Investigaciones Sociales, UNAM. ISBN978-9-703-20277-5.