The nyktomakhi is of about the same length as Bjarkamál, and containing the same elements: The Trojan horse/the smuggling of Swedish weapons; Danes/Trojans are sound asleep when Swedes/Greeks attack them; plus the climax: The godess Venus informs Æneas that it is the will of the gods themselves (that is, Jupiter, Juno, Minerva and Neptune) that Troy shall fall, and so he can honourably flee.
Hrolf's champions are roused from sleep and rallied by the chanting the Bjarkamál, a famous Old Norse poem whose origins supposedly lie in this event; it has been largely lost, but Anderson presents a partial reconstruction as part of his story.