(( The scribe on the covenfolk list doesn't have a name: I hereby dub him Yves d'Aurillac, and will edit OP accordingly. ))
A short while later...
"Who the hell are you and what are you doing in my carrel??"
Stultus blinks up mildly at the interruption, and the scribe swallows and draws himself up. "M-my apologies, magus. I didn't realize who you were. O-of course you can use my carrel... if you want to... not sure why, I mean, you have your own space, with better lighting..."
"Quit babbling, man. I don't eat scribes, last one gave me indigestion. Stick around, please, I'm going to need your services in a minute." Stultus returns to what he's doing -- drawing on a piece of vellum with meticulous, careful strokes. The image of the Mighty Magus Scribing Portentous Thoughts is spoiled somewhat by the fact that Stultus' tongue is sticking out of the corner of his mouth.
A few minutes later, Yves has recovered from his fright sufficiently to crane his neck and peek at what the dwarf is doing. "Um. Sir? That's pile is scrap parchment, to be scraped down into palimpsests and reused. I can get a fresh sheet of vellum for you...?"
"No need. I know it's scrap, that's kind of the point." Stultus lays the quill aside, scatters sand over his work and shakes it off. "There. Done. Come here, if you would." He hops up from the chair, giving the long-suffering scribe his work area back, but stands at his elbow. "Do you see what I've done here?"
"I think so... You, uh, took a bill of lading from a week ago, and ... added a decorative border to it?" It's not a very good decorative border. In fact, it's a pretty bad decorative border, and the scribe's pride in his skill briefly overrides his caution of the magus. "I could straighten it up for you..."
"Because it looks like an apprentice illuminator was practicing while drunk? No. Don't straighten it up, I want it to look like that. What I'd like you to do instead is scrape this down and turn it into a palimpsest... and do a piss-poor job of it. Like, say, you were an apprentice in a hurry so you did the absolute minimum amount of work possible. I don't care about the text, but I do want that border visible. Faded, but visible. Think you can do that?"
Yves looks from the magus to the drunken-looking decorative border down the side of the page (that, unbeknownst to him, has the Hebrew letters of the missive to Gabrielle worked in among the curlicues) and nods dubiously. "I suppose..."
Stultus claps him on the shoulder. Well, on the elbow, he can't reach any higher. "Good man. Get it to me in the next few days, if you please -- and thank you, I appreciate your work." He saunters out of the scriptorium, humming under his breath.