Premise: Baffled by this fresh obstacle , the remainder of the cavalry fell back ; and as , at the sight of this movement , the flight of arrows redoubled from the casements of the houses , their retreat had , for a moment , almost degenerated into flight .<br>Almost at the same time , those who had crossed the barricade and charged farther up the street , being met before the door of the Chequers by the formidable hunchback and the whole reserve of the Yorkists , began to come scattering backward , in the excess of disarray and terror .
Hypothesis: The obstacle is not old.