"Ah, good idea."
She looks around for some paper and some ink and a pen, and writes in an elegant elvish hand:
"To the one known as Hedge Mage,
We hope this missive finds you well. If you notice that your abode was dwelled in while you were gone, please understand that it was vital that we saw you, and had no other place to stay. Any expense incurred from our time there will be cheerfully reimbursed, of course.
A rogue mage of unknown identity has kidnapped a woman from the street, despite the efforts of my friends and I to prevent it. We hoped you might be willing, and able, to lend assistance in this matter, as the guard could not without more evidence."
May the light shine through the trees, and fall upon your path.
Sulannus."
She sets the letter down then on a chair, and drags it to the hall just in front of the door.
"There. A bit crude of phrase, but we are in a hurry, and hopefully he will not take it amiss."