Likely tired himself out with his father. The excitement probably got to him.

[ Jefferson's brow knits slightly as he nods down the hall, leading the way back to the study. It's warmer in there than the living room or anywhere other than the upper bedrooms, since heat tends to rise, but the amount of books and lavish furniture in there traps the heat better than most. ]

Storybrooke suddenly feels a little more crowded. You wouldn't think just three people would be capable of that, especially considering one of them is...well, one of us.