Related Clues:
- Horse-and-buggy and others
- Two-term presidents' tenures, e.g.
- Precambrian and Progressive
- Hawthorne's ''___-Told Tales''
- Periods of history
- Pieces of history
- Two-term presidents' terms, e.g.
- Federalist and Imperialist, for two
- Long lines on a timeline
- History chapters?
- Deadball and steroid, e.g.
- The Depression and the cold war, for two
- Geological time periods
- Elizabethan and Big Band
- Post-Civil War Reconstruction and others