A placement charm? Norah couldn't think of anything aside the obvious to say, so instead of chancing an answer she rummaged around in her bag to extract and quill and parchment. She realized the obvious issue with this when her search for a surface to place her parchment on failed her, so she stuffed the parchment back into her bag and just listened. Mental notes count for something, right? And anyway, her fingers were too numb to write. A placement charm places things, easy enough.