| Interesting historical periods |
| Shine a Little Love" grp. |
| Canine care grp.? |
| Historical meeting places |
| Law grp. |
| Seniors' grp. |
| Prehistoric creature |
| Term for a presidential period, historically |
| Industrial standards grp. |
| Prehistoric implement |
| Wharf workers' grp. |
| Scopes Trial grp. |
| Historical chapters |
| Either of a historic PGA pair? |
| Historic spans |
| Top-level U.S. advisory grp. |
| Secret grp. since 1947 |
| Notable historical spans |
| Evil Woman" grp., 1975 |
| Airline watchdog grp. |
| Advisory grp. that includes the drug czar |
| Grp. that conducts many tests |
| Drilling grp. |
| Historic records |
| Amount of land a pair of oxen could plow in a day, historically |
| Historical novelist Seton |
| Grp. |
| Actors' grp. |
| Phooey on that prehistorically set comic strip! |
| Grp. of professionals |