n the summer of 1887 five prospectors were exploring Spring Gulch (present-day Keystone Creek), a southwesterly flowing stream from Keystone Mountain to the Missoula River (today known as the Clark Fork) in Montana Territory. A few miles upstream they discovered an abundance of silver galena and immediately registered claims in Missoula. They registered the Iron King and Iron Queen on August 3, the Silver Glance on the 4th and the Ivanhoe and Keystone on the 5th. The five added the name of Phil O’Rourke, who had located the Bunker Hill group of claims in Idaho Territory and grubstaked
