 They had two daughters, Ruth and Helen, both born in Nebraska.In 1898, and in occasion of the Indian Congress held in conjunction with the Trans-Mississippi and International Exposition, Rinehart was commissioned to photograph the event and the Native American personalities who attended it.Together with his assistant Adolph Muhr (who would later be employed by the famous photographer Edward S. Curtis), they produced what is now considered ""one of the best photographic documentations of Indian leaders at the turn of the century"".