The Egil's Saga on Sigtrygg Swiftfarer

Chapter 1 - Of Kveldulf and his sons. > Chapter 18 - Thorolf's ship is taken.

• relationship: Sigtrygg Swiftfarer and Hallvard Hardfarer were kinsmen of Harold on the mother's side

  "There were two brothers named Sigtrygg Swiftfarer and Hallvard Hardfarer, kinsmen of king Harold on the mother's side"

• attestation: The four brothers' father was a wealthy man with an estate in Hising

  "from their father, a wealthy man, they had inherited an estate in Hising."

• relationship: Four brothers total: Sigtrygg and Hallvard traveled, while Thord and Thorgeir managed the estate at home

  "Four brothers there were in all; but Thord and Thorgeir, the two younger, were at home, and managed the estate."

Chapter 1 - Of Kveldulf and his sons. > Chapter 21 - Hallvard and his brother go after Thorolf.

• attestation: Sigtrygg and Hallvard reported Thorolf's destruction of their estate at Hising and the killing of their brothers

  "Sigtrygg and Hallvard were with him: they had heard what Thorolf had done at their house on Hising, what scathe he had wrought there, and of the slaughter of their brethren."