Related Clues:
- With 43-Across, sane
- An earlier one may be recalled
- Paleozoic, for one
- "--- That Jazz"
- Historical stage
- Ruth's was 2.28
- Unique stretch in time
- Paleozoic, for example
- --- of Good Feelings
- Several periods
- Period piece?
- One hundred percent
- Important historic period
- Geological time period
- Important time span