In the September 14, 1911 edition of the Idaho Statesman there was an article about a rock found by the son of M.D. Yeaman, who was described as a pioneer farmer. Yeaman’s son allegedly found the rock while plowing a field near the headwaters of the South Fork of the Snake River. A scar made by the plow can be seen on the rock. Carved into the sandstone was “Clark 1805.”
To confuse things a bit further, the Statesman received a letter a few days later in which a second stone was said to exist. The article is reproduced below.
Thanks to Idaho State Historical Society Curator of Collections Sarah Phillips, I’m able to show you a picture of the Clark Rock. She located the rock in their collection and sent me the photo below right.
We will probably never know for certain. My best guess is that the Clark Rock is just a prank.
Thanks, again, to the Idaho State Historical Society for use of their photo of Clark Rock.