Before Tessa could answer, there was a knock at the door, and a familiar voice. "It's Jem. Tessa, are you there?"
Charlotte sat bolt upright. "Oh! He mustn't see you in your dress!"
Tessa stood dumbfounded. "Whyever not?"
"It's a Shadowhunter custom—bad luck!" Charlotte rose to her feet. "Quickly! Hide behind the wardrobe!"
"The wardrobe? But—" Tessa broke off with a yelp as Charlotte seized her about the waist and frog-marched her behind the wardrobe like a policeman with a particularly resistant criminal. Released, Tessa dusted off her dress and made a face at Charlotte, and they both peeked around the side of the furniture as the seamstress, after a bewildered look, opened the door.
Jem's silvery head appeared in the gap. He looked a bit disheveled, his jacket askew. He glanced around in puzzlement before his gaze lighted on Charlotte and Tessa, half-concealed behind the wardrobe.

Auteur: Cassandra Clare