The Wild Huntress - Thomas Mayne REID

Marian and Lilian are two sisters living in the backwoods, somewhere in America, with their father as squatters. One May morning a man shows up, wanting to take Marian away as his wife while he makes his mark with the Mormons. But, another man holds Marian's heart, and he will go on his own adventure through the American west to track her down. (Summary by Ann Boulais)