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Related Clues:
- Time line divisions
- Presidencies, to historians
- Thick novels
- Multigenerational tales
- Sections of history
- Mound stats
- Important time periods
- Lengthy narratives
- Gay '90s, Roaring '20s, et al.
- Oft-named time periods
- Time pieces?
- Big periods
- Some historical spans
- Paleozoic and Edwardian, e.g.
- Stretches of history