The inscriptions relate to ritual events of 1828, including a ball game; one is signed "we are the ones with blood flowing from our noses." (The Cherokee ball game, something like lacrosse, was a rough sport.)
my favorite detail:
"The ceiling inscriptions are written backwards, as if addressing readers inside the rock itself," Simek said. "This corresponds with part of one inscription which reads 'I am your grandson.' This is how the Cherokee might formally address the Old Ones, which can include deceased Cherokee ancestors as well as comprise other supernatural beings who inhabited the world before the Cherokee came into existence."How wonderful that these survive, so that Cherokee and everyone else can see and learn about this piece of history.