Libby Holden and her family were sorting through items that belonged to her grandmother when they found a Lakota oral history document. According to a note on the front page, Holden’s great-grandmother typed this document in 1910 to record oral history told by Chief White Horse. The oral history uses a form known as a winter count. Each year is described by a significant event. The stories go along with a series of drawings known as pictographs. They go all the way back to 1790.