Assume that Dinah draws a check on Oxford Bank, payable to the order of Pam; that Pam indorses it to Amy; that Amy deposits it to her account in Houston Bank; that Houston Bank presents it to Oxford Bank, the drawee; and that Oxford Bank dishonors it because of insufficient funds. Houston Bank receives notification of the dishonor on Monday but, because of an interruption of communication facilities, fails to notify Amy until Wednesday. What result?