Most of the dirt had been removed during Mo's first round of spells, and he was now able to get directly at the small glass panes making up the window. He leaned in to peer through one of them, hoping to see glimpses of daylight and the grounds through the smudgy glass, but it was too thick and warped (and smudged) to let more than pale light through. Maybe after cleaning it would be better?

He really ought to try the spell first, though. Mo turned away from the window and murmured the unfamiliar incantation until the shape and texture of it felt right in his mouth. He gave a few healthy jabs of his wand, mostly for effect, and only then did he turn back to the window. "Vitrumonia," he pointed his wand at the first pane and was pleased to see the glass go all shiny and clean. Exactly... now the next pane.