of course , all that was behind them now , but the guild of merchants ' annual knife-and-fork supper would have been held in the drum 's upstairs room the following evening , and all the eighth level wizards had been sent complimentary tickets ; there would have been roast swan and two kinds of trifle and lots of fraternal toasts to 'our esteemed , nay , distinguished guests ' until it was time for the college porters to turn up with the wheelbarrows .