From the Guidebook:
The 27,000-acre Rancho was
once part of an 18th-century Spanish land grant to soldier
Manuel Nieto. The Monterey-style adobe was constructed
in 1844 and served the Temple and Bixby families as headquarters
for large-scale cattle and sheep ranching operations in
the 19th century. In the 1880s, the land was subdivided
for farming and city development.