Well, his first plan was to enter quickly as the door opened, but he realized he would be noticed as the kid bowed. So, the ferret spirit was  shut out again as the door closed, prompting the little guy to sigh. How was he going to get in now? He came out of the tuft of grass and looked the house over. It wasn't long after that the kid let off a gust of wind, and blew a piece of paper out the window. 

He looked at it before smiling to himself. The boy didn't have windows? running over  and gathering the paper, he gave it a little scan. it was about his kind, and some old historical notes at that. Was he studying the old ways? That would explain a few things.  

After waiting a moment, Allendrois heard the activity die down. Taking his chance, he climbed up and peeked through the window. the place was organized again, he imagined  it was a pretty bad mess before, judging by the gust that went through earlier. But he still stayed, at least until Jin left the room. 

He took his chance and quickly climbed through the window, jumped down onto the floor, and found a place to hide just in case he was heard. After a moment of nothing, he slowly started to snoop around, making his way over to the documents. Shifting human, he returned the piece of paper to the piles of similar papers, sat down, and used his powers to bend the moonlight just enough to have some light to read through the papers. 

He was up a good portion of the night, looking through what appeared to be hand written notes. Eventually both the lack of sleep and the use of his magic took their toll on him and he yawned. Lazily stacking the notes back  into what he thought was probably their place, he shifted back into ferret mode and wandered around, until he found Jin's pile of clothes. Tired enough to not be picky, and not quite be aware of how things will go down in the morning, he made  himself a bed, covered himself, and went to sleep.