While Lily had been watching Regulus work while he duplicated her bag and then her notebooks she hadn't practiced that charm enough to be confident in replicating the nails Slick had managed to find.

At least the process of making tree nails looked simple enough, and keeping whatever he meant to board the windows with would be easy enough. Already forming a plan of action Lily's gaze returned to Slick.

"Pick a window. I'll hold the wood to it while you nail?"