XIII
| Date | Clue |
|---|---|
| 2019-03-06 | Lowest number not found on a grandfather clock |
| 2011-12-31 | Number of one of the Olympics canceled due to W.W. II |
| 2011-09-28 | Unlucky number for Caesar? |
| 2008-12-26 | Chapter 13? |
| 2004-05-03 | Number not on a grandfather clock |
| 1999-08-16 | Hour not found on a grandfather clock |
| 1999-03-30 | Constitutional Amendment that abolished slavery |
| 1996-12-20 | Number not on a clock |
| 1995-08-25 | Missing floor in Caesar's Palace? |