THE IRISH TWINS. Grade V.
THE ITALIAN TWINS. Grade V.
THE MEXICAN TWINS. Grade V.
THE SCOTCH TWINS. Grade VI.
THE SPANISH TWINS. Grades VI-VII.
THE BELGIAN TWINS. Grade VII.
THE FRENCH TWINS. Grade VII.
Historical Series
THE INDIAN TWINS. Grades III-IV.
THE CAVE TWINS. Grade IV.