Sara Kearns went to an auction at Christie’s to bid on a tapestry for her employer, Nardin Fine Arts Gallery. The good news is that she purchased a Dufy tapestry for $77,000. The bad news is that it was not the one her employer had told her to buy. In the excitement of the auction, she forgot her instructions. Nardin refused to pay, and Christie’s filed suit. Is Nardin liable for the unauthorized act of its agent?