"It's too bad," Remus said, reading over Regulus' shoulder as his one hand was occupied toying with Regulus' hair and he couldn't be bothered to use the other to retrieve his own journal from the pocket where he kept it stashed, "we can't trust that it will stay the harmless items it seems to be now. You'll probably want to warn Kreacher. But, I wonder if we could come up with a spell to either prevent the appearances here or at least isolate them..."
Truthfully, Remus John Lupin had never met an academic puzzle he didn't like. His approach to creating new spells might be less spontaneous than some, but he liked to think they were as good or better than most.
Struck by a sudden thought, he shifted so that he could get his own journal out after all and scribble a hasty note to Peter. When he was done, he slipped the book back into his pocket -- all without using the hand still twirling locks of Regulus' hair around his fingers. He laughed softly. "This is why I limit when I read these. I'll end up sidetrack by a question like this and off researching ideas."