Related Clues:
- Dropped off note and final letter
- Slept for a short while
- Dozed for a bit
- Caught some z’s
- Enjoyed a boring lecture?
- Wasn’t vigilant
- Didn't pull an all-nighter
- Took a nap, say
- Got some rack time
- Had a great night's rest
- Had a brief snooze
- Was out at night?
- Enjoyed REM, say
- Took a day to consider, with "on"
- Was dreaming, perhaps