It must have been hours later that she awoke. Instinctively, Hermione noted that it must have been an incredibly well-brewed dreamless sleep and then she snorted at her own idiocy.  Snape brewed it, of course it was bloody perfect. She remembered Harry’s book from sixth year, showing how even as a student Snape had been making improvements on the official recipes.  And he calls  me  the know-it-all,  she smirked, though there was, she realised with surprise, no bitterness whatsoever in that thought anymore. She hadn’t realised that her "Prince Charming’ arithmancy work would lead her to the Half-Blood Prince... though now that she considered it, she supposed that too may have been part of why he assumed it was a prank.