The ethnologist Karl Jettmar has pieced together the history of the area from inscriptions and recorded his findings in Rock Carvings and Inscriptions in the Northern Areas of Pakistan and the later-released Between Gandhara and the Silk Roads — Rock Carvings Along the Karakoram Highway. Many of these carvings and inscriptions will be inundated and/or destroyed when the planned Basha-Diamir dam is built and the Karakoram Highway is widened.