Rancho Azusa de Dalton
Rancho Azusa de Dalton, (originally the Rancho El Susa), was a 4,431-acre (17.93 km2) Mexican land grant in present-day Los Angeles County, California, given in 1841 by Governor Juan Alvarado to Luis Arenas. Arenas sold his Rancho Azusa de Duarte holdings three years later to Henry Dalton (1803 - 1884), a wealthy merchant from Pueblo of Los Angeles. Dalton named his holding Rancho Azusa de Dalton.
Cities that have been established on the Rancho lands originally granted to Henry Dalton include Azusa, Arcadia, Monrovia, Irwindale and Baldwin Park.
Luis Arenas received the Rancho El Susa land grant from Governor (pro-tem) Manuel Jimeno in 1841. In 1844 Henry Dalton purchased El Susa from Arenas, and also Arenas one third interest in Rancho San Jose.
Henry Dalton was born in England, and in 1820 sailed to Lima, Peru, and became a merchant eventually commanding a small fleet of merchant vessels. By 1841 he had become a prominent figure in California coastal trade. Dalton chose Rancho El Susa as his home renaming it Azusa de Dalton. Dalton built a house here on a place known as Dalton Hill, near 6th Street and Cerritos Avenue in Azusa. The Rancho Azusa Dalton lay east across the San Gabriel River from the Rancho Azusa de Duarte. The first was often called El Susa, and the latter Susita. Dalton further increased his holdings to include the Rancho San Francisquito and Rancho Santa Anita. In the end Dalton owned an unbroken expanse of land from the present day San Dimas to the eastern edge of Pasadena.
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