This image provided by the Saddle Ridge Hoard discoverers via Kagin's, Inc., shows one of the six decaying metal canisters filled with 1800s-era U.S. gold coins unearthed in California by two people who want to remain anonymous. The value of the "Saddle Ridge Hoard" treasure trove is estimated at $10 million or more. (AP Photo/Saddle Ridge Hoard discoverers via Kagin's, Inc.)

California gold discovery spurs rush of theories

Word last week that a Northern California couple found $10 million in gold coins while walking their dog has set off a Gold Rush of theories over who left behind all that loot.…