From the plaque:
Danish sea captain Cornelius
Jensen sailed to San Francisco during the Gold Rush to
sell his cargo. In 1854 he settled in Agua Mansa, established
a store, and married Mercedes Alvarado, a descendant of
a pioneer Californio family. The Jensens purchased this
ranch in 1865 and began planting vineyards and orchards.
They used local materials to build their house which is
of Danish vernacular design. The Jensens made this ranch
an important civic, social, business, and agricultural
Plaque placed by the State Department of Parks and Recreation in cooperation with Riverside County Historical Commission and E Clampus Vitus, October 11, 1987.