Hydraulic mining operations, begun in 1855, brought thousands of fortune seekers to form a town of 17 hotels, a library, a theater, and courts of quick justice. During the Civil War, Volcano's gold served the Union — Volcano Blues smuggled the cannon "Old Abe" to intimidate rebel sympathizers.
Ref. wiki [url]http://en.wikipedia.org/wiki/Volcano,_California[/url]