Frode heard this from the sentries in the morning; and when he perceived that Ragnar had come to tell him of the treachery, he gathered together his soldiers, and resolved to forestall deceit by ruthless measures.

Harald's sons had no help for it but to feign madness.

For when they found themselves suddenly attacked, they began to behave like maniacs, as if they were distraught.

And when Frode thought that they were possessed, he gave up his purpose, thinking it shameful to attack with the sword those who seemed to be turning the sword against themselves.

But he was burned to death by them on the following night, and was punished as befitted a fratricide.