Christopher and Columbus.

The protagonists are Anna-Rose and Anna-Felicitas von Twinkler, 17-year-old twins from an aristocratic, half-German family. Orphaned, they are sent to an uncle in England, but World War I is on and afraid of anti-German hysteria, the uncle packs them off to America. On the ship they are befriended by a man who becomes the girls' protector on their American adventure.