Well, of course I'm not sure he's a Border Collie, but it's a safe bet he's the smartest person pictured.
"Washing and panning gold, Rockerville, Dakota. Old timers, Spriggs, Lamb and Dillon at work. The Black Hills Gold Rush began in 1874. The first arrivals were a force of one thousand men led by George Armstrong Custer to investigate reports that the area contained gold, even though the land was owned by the Sioux. They found small amounts of gold in present day Custer, South Dakota, and looked for better paying locations. They moved north, establishing the towns of Hill City, Sheridan, and Pactola. At each spot they found flakes of gold, but not the bonanza they sought."
Contributor: Science History Images / Alamy Stock Photo