By the time of King Andreas' reign, Sigmund's descendants had ruled Sodor for over 160 years. Between 1262 and 1263, he took part in King Haakon IV of Norway's war against King Alexander III of Scotland to assert Norwegian sovereignty over the islands on Scotland's western seaboards. He and his 23 year old son, Prince Peter, were killed in the Battle of Largs on the 2nd of October 1263.
Peter died childless, so with the death of Andreas and Peter, the direct royal line failed and no one else was able to make a strong claim for the Throne, while Scotland quickly claimed and invaded Sodor. Sudrian nobles decided to end the succession crisis by electing a King, choosing Sir Harald Marown. Sir Harald's claim was weak and he was too scrupulous to accept more than election to a Regency until a better qualified claimant should appear. None did and regents continued to rule Sodor until 1404.
- 1987 - The Island of Sodor: Its People, History and Railways (mentioned)