then pippin cried aloud , for the tower of ecthelion , standing high within the topmost walls , shone out against the sky , glimmering like a spike of pearl and silver , tall and fair and shapely , and its pinnacle glittered as if it were wrought of crystals ; and white banners broke and fluttered from the battlements in the morning breeze ' and high and far he heard a clear ringing as of silver trumpets .