but turgon said that he was king of gondolin and no will should force him against his counsel to emperil the dear labour of long ages gone ; but tuor said , for thus was he bidden by ulmo who had feared the reluctance of turgon : `` then am i bidden to say that men of the gondothlim repair swiftly and secretly down the river sirion to the sea , and there build them boats and go seek back to valinor : lo !