Unto the Great Twin Brethren We keep this solemn feast. Swift, swift, the Great Twin Brethren Came spurring from the east. They came o'er wild Parthenius Tossing in waves of pine, O'er Cirrha's dome¹, o'er Adria's foam², O'er purple Apennine, From where with flutes³ and dances Their ancient mansion⁴ rings, In lordly Laced on, The City of two kings, To where, by Lake Regillus, Under the Porcian height, All in the lands of Tusculum, Was fought the glorious fight.