Remington's room was the obvious room for the preparations to take place. It was sandwiched between Natasha's and Valeria's, and there was an empty room across the hall, so it was the farthest away from outside ears. They had gathered inside at the ninth bell, intending to keep going until they got it right or collapsed from exhaustion, whichever came first. It had been exhaustion. Natasha was sprawled out over pages of calculations and diagrams, and most of the items in the room, including the snoring Remington, were now invisible. Valeria was the only one awake, sneaking furtive glances at her sister as she copied the Conjuration homework. If Natasha had been awake, she would probably have objected to sharing, but she wasn't, and there was no way Valeria was going to do the homework herself if she didn't have to.
When she finished copying the homework, making sure to get a couple of the questions wrong, she returned Natasha's papers to their correct place, and then woke her sister. They didn't need any rumors if they were found sleeping in a boy's room, after all. The girls cautiously searched the room for Remington, trying their best not to knock over any invisible objects as they did so. Finally Valeria found him and shook him awake, allowing him to release the spells of invisibility. With the customary clutter restored to view, including a pile of unsanitary dirty robes which Valeria wished he had left invisible, the girls returned quickly and quietly to their own rooms.