With the weird weather going on lately, and the fact that Cornish kept getting lost in the mist and finding himself encountering strange piles of papers that threatened to fall on him every time he thought he'd found his caravan, he didn't relish the thought of the students wandering around blindly on the grounds in search of his hut.

Half of them would end up in the lake anyway.

So he had broken into the Slytherin Common Room (with the permission of the Headmaster and the help of the Head of House) for today's lesson. Students would find the door propped open by an obliging house elf and the professor standing crossly in front of the couches by the portholes looking into the lake. It was the only way he could watch his creatures at this point, and it was far from acceptable.