The Amazing Adventure (1917)

Because of her wealth, Eleanor Errol is besieged by suitors, but she will have none of them. One day a detective in her employ gives her some information. She orders her motor and makes a trip through the park. She approaches a shabbily dressed man, Geoffrey Harland, and suggests that he waive an introduction and dine with her. He does so. After dinner she proposes that he marry her and he consents, still wondering. She makes him promise that he will never speak of their marriage. They start on their honeymoon. Harland is soon in love with her and tries to solve the "why" of it all, but cannot seem to arrive at any solution. One day he sees her talking to a man at a hotel, but she disclaims knowing anyone there. This angers him. He accuses the man of knowing his wife, but he disclaims any knowledge of knowing Harland's wife. The man is the detective who had been in Eleanor's employ. She feigns illness and goes to her room, followed by the now-angry Harland. Then she confesses that she has loved him since the time when as a child he had saved her life during one of his prospecting trips. She tells him she employed the detective to follow him.