Double dashes can be used to signal the interruption significant information inserted in between an independent clause: Comitatus---the honor code between the king and his army where the king provided shelter and riches to his military men in exchange for their loyalty and protection---is exemplified in the epic, Beowulf. The unbreakable law binding together king and his warriors--comitatus---provided warriors an honorable reason to fight. A single dash can be used after an independent clause as an effective way to insert a significant insight of an interrupted thought. Hrothgar tells Beowulf that it is important to remember that nothing on Earth is forever, since everything belongs to God---even Beowulf’s glory. AVOID VAGUE PRONOUNS: They were supposed to aim for heavenly glory ad rewards in the afterlife. Beowulf, a true hero, knew this.