Courage of Marge O'Doone, The by James Oliver Curwood (1878 - 1927)

David Raine is travelling, trying to escape his own memories. On the train he meets Father Rolland, who invites him North, to a world of "mystery and savage glory", to help him find himself again. On the same train, he meets a mysterious woman searching for a man named Michael O'Doone. When she's gone, he finds a thin package on her seat. It contains the photograph of a girl and David makes it his aim to find her, while following Father Rolland into the mysterious North. (Summary by Rapunzelina)