| Answer | Crossword Clue |
|---|---|
| USMAIL | Letters in - or on - boxes |
| TNT | Letters on exploding boxes in Angry Birds |
| recur | go back in thought or discourse on recurring to my letters of that date Thomas Jefferson |
| amarna | of or pertaining to the period in ancient Egyptian history described on cuneiform tablets (Amarna tablets) that were found in 1887 at Tell el Amarna and contain the correspondence (Amarna letters) from neighboring kings and governors to Amenhotep IV and h |
| USMAIL | Letters on blue boxes |
| ACDC | Letters on some switch boxes |
| AGFA | Letters on old film boxes |
