In That Girl Montana, Montana Rivers's father forces her to dress like a man and assist in thefts and other criminal acts. She lives in an Indian camp, but the chief doesn't believe it is a good idea. He asks his friend Dan Overton to help. but Dan falls in love. Montana is hiding a dark secret however, and must ensure Dan keeps his distance.
Marah Ellis Ryan (née Martin; February 27, 1860 or 1866 - July 11, 1934), also known as Ellis Martin, was an author, actress, and activist from the United States. 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. She married Samuel Erwin Ryan (b. 1834), an Irish actor and comedian, in 1883. She became a popular author, writing numerous novels during the period 1889-1925.
Around 1909, she went to live among the Hopi in Arizona. 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."
She died in Los Angeles of encephalitis at the age of 68 (Wikipedia).