She was considered an authority on Native Americans after living with the Hopi.
Ryan was born in Butler County, Pennsylvania, to Graham and Sidney Mechling Martin.
She started her career under the pen name of Ellis Martin, writing a few poems and stories.
According to the New York Times, Ryan "claimed to be the only white woman ever admitted to the secret religious rites.
She was noted as an authority on the tribal life of the Indians in the United States and Mexico.