What I learned (was forcefully reminded of) last night:
Cats are nocturnal.
Ernie is amazingly playful for a 20+ lb teenage cat.
Ernie is *very* talkative when he's awake. And when you are the only audience in the house (all other humans and animals are presently elsewhere), he has A LOT to tell you--especially if you forgot to give him fresh water and stir his food around before bed.
Mojitos, while full of minty vitamin C goodness, do not actually contribute to restful sleep.
It's much lighter at 5:44 am in Boston than it is here in Atlanta, (as evidenced by what was on the HenCam at that time--and what does it say about me that I was looking at someone's live webcam feed of their chicken/bunny play yard at 5:44 am?!? Even the animals have the sense not to be up yet!)
Now I'm going back bed to try for a little more sleep (and leaving Ernie safely DOWNSTAIRS).