| Text | Length |
| Chapter of history | 18 |
| Chapter in history | 18 |
| Quod ___ faciendum | 18 |
| Unforgettable time | 18 |
| Stat for a pitcher | 18 |
| Paleozoic, for one | 18 |
| Historical chapter | 18 |
| Historical stretch | 18 |
| Christian, for one | 18 |
| A time to remember | 18 |
| Time scale section | 18 |
| Segment of history | 18 |
| Period to remember | 18 |
| Gay Nineties, e.g. | 18 |
| Chronology segment | 18 |
| '70s NOW cause | 18 |
| Time of importance | 18 |
| The Cenozoic, e.g. | 18 |
| Stat for Cliff Lee | 18 |
| Period with a name | 18 |
| Nostalgia elicitor | 18 |
| Musical generation | 18 |
| Mauve Decade, e.g. | 18 |
| It's a stretch | 18 |
| Hurler's stat. | 18 |
| Horse and buggy __ | 18 |
| History book topic | 18 |
| Former NOW concern | 18 |
| Christian or Roman | 18 |
| Big Band follower? | 18 |
| What NOW wants now | 18 |
| Victorian for one | 18 |
| Time-line division | 18 |
| The Jurassic, e.g. | 18 |
| The Big Band, e.g. | 18 |
| The 90's, e.g. | 18 |
| The 50's, e.g. | 18 |
| Starters' stat | 18 |
| Starter's stat | 18 |
| Seaver's stat. | 18 |
| Roman or Christian | 18 |
| Reliever's no. | 18 |
| Randy Johnson stat | 18 |
| Paleozoic for one | 18 |
| Number of Fingers? | 18 |
| Monroe enjoyed one | 18 |
| Important interval | 18 |
| HurlerÂ’s stat. | 18 |
| History text topic | 18 |
| Good Feeling, e.g. | 18 |
| Good feeling time? | 18 |
| Geologic time span | 18 |
| Generation or more | 18 |
| Gay 90's, e.g. | 18 |
| Fireman's stat | 18 |
| Defeated Amendment | 18 |
| Chronology section | 18 |
| Chronological span | 18 |
| Byzantine, for one | 18 |
| An interest of NOW | 18 |
| Actian or Augustan | 18 |
| 1970s polit. cause | 18 |
| Irons film of 2006 | 18 |
| Historic timespans | 18 |
| Swing and Big Band | 18 |
| Stats for pitchers | 18 |
| Time-line segments | 18 |
| Remembered periods | 18 |
| Precambrian et al. | 18 |
| Particular periods | 18 |
| K's lower them | 18 |
| Vulgar and Mundane | 18 |
| Talked-about times | 18 |
| Swing and Gaslight | 18 |
| Spanish and Vulgar | 18 |
| Prohibition et al. | 18 |
| Parts of timelines | 18 |
| Mundane and Vulgar | 18 |
| Hurlers' stats | 18 |
| Eventful stretches | 18 |
| Certain time spans | 18 |
| Aces have low ones | 18 |
| Subject to removal | 18 |
| Easy to wipe clean | 18 |
| Do blackboard duty | 18 |
| Delete from memory | 18 |
| Wipe off the board | 18 |
| Take off the board | 18 |
| Clean a blackboard | 18 |
| Remove from memory | 18 |
| Demagnetize, maybe | 18 |
| Delete from a disk | 18 |
| Clear a blackboard | 18 |
| Rub the wrong away | 18 |
| Job for the board? | 18 |
| Wipe, as an iPhone | 18 |
| Use whiteout, e.g. | 18 |
| Use the delete key | 18 |
| Rid of chalk, e.g. | 18 |
| Remove with rubber | 18 |
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