as the dance was winding down , i realized that preparations for the play must have resumed at some point , for now the stage held not only a prison , and a cell , but also a courtyard with a rectangular , low-walled water well ; an early roman dining room with doors and large windows opening onto a blue and beautiful outside sky ; and people milling abouttens , hundreds , hard to tellin a town square over to the far right , the stage suddenly impossibly large .