midnight
`` I have an express package for you , '' explained Bart . `` Oh , you have ? '' snapped Mr. Martin . `` What the mischief do you mean waking a man up at midnight on a thing like that ! Deliver it at the factory in the morning . '' The speaker , muttering direfully under his breath , was about to slam down the window . `` Wait one moment , Mr. Martin , '' called up Bart sharply .