Last night before I went to bed, I moved William in to the girls room and moved Henry to the middle of his crib. This movement disturbed him (quite possibly because it was so close to his 1st awakening and he was in a shallow sleep cycle) and about five minutes after I climbed in to bed, he woke up. He fussed on and off for about 10 minutes and fell back to sleep.
He was awake this morning at precisely 5:15.
I didn't go to him and instead, listened to his whines (not a true cry) oscillate very loudly for the next hour and a half. When I got up at 6:30 (because Elizabeth was sleeping across my head), the door to the boys room was wide open and William had climbed back in to his own bed. When I walked in he gave me a frustrated look and said "Henry being LOUD, mom!"
Yes, son. I knew he would be. That's why I put you in with your sister.
Henry had one leg stuck out of his crib and I suspect that if he had not been in this precarious position, he would have fallen back to sleep much sooner. Once I reorganized him in the crib, he dozed off. I am not planning to pick him up until 7:00, or whenever he is up for the day.
If I had gone to him at 6:00, before he fell back to sleep on his own, I believe that he will continue waking up early and fussing, with the knowledge that he will eventually be picked up.