The caption on this photo reads, “Historical Landmark, Adobe Building, Dutch Flat, California, circa 1960. Built by the Chinese in 1877. Instead of adobe bricks, they used a solid-wall type of construction. Dutch Flat California is a quaint old mining town of the Gold Rush Days, which in 1853 had a population of 6,000 including 3,5000 Chinese”. The solid-wall construction method probably refers to rammed earth.