So cried, shouted, shrieked a chorus, as a street door was torn open to admit four boys, with their leathern straps of books over their shoulders. They set up a responsive yell of 'Jolly! Jolly!' which being caught up and re-echoed by at least five voices within, caused a considerable volume of sound in the narrow entry and narrower staircase, up which might be seen a sort of pyramid of children.