VENTURA, Calif. (AP) — A project to rehabilitate a 19th century ranch house on one of the Channel Islands off Southern California has led to the discovery of another ancient Native American site in the archipelago, the National Park Service said Tuesday.

Archaeologists discovered stone tools representative of early North American Paleoindians when the main house at the historic Vail & Vicker Ranch on Santa Rosa Island was lifted for construction of a new foundation.

The tools, described as barbed points and crescents, were used for hunting and fishing in the islands, five of which comprise Cha...