"Oh," Al said. "Silencio would be sufficient, true." He bit his lip. "I'll need to consult Madam Pince's portrait with regards to the filing system... and keep an elf around just in case."
He tilted his head, looking up at the rows and rows of books, then at Severus. "I might need to remain here for the rest of the evening to prepare for the opening tomorrow."
It wouldn't take all night, but still... Al supposed he'd best be ready early.