'i was just asking his highness what ' '-and if you , your highness , and you , mr ... my word , what a big sword , and you come back here and take your place among the honoured guests , and we 'll be ready in a brace of sheikhs ... ' what a thing it is to have a copper 's mind , vimes thought , as the great file of wizards and guests tried to form a dignified and orderly line behind him .