Thorgils Skarthi is reputed to have founded Skarðaborg in North Yorkshire, England about 966. The new settlement was later burned to the ground by Tostig Godwinson, Earl of Northumbria and Lord of the Manor of Hougun. 
Thorgils Skarthi is described in the Kormáks saga which is principally about his brother, the Icelandic skald, Kormákr Ögmundarson who was the court poet of Norwegian nobleman Sigurd Haakonsson.  English chronicler Robert Mannyng of Brunne in his book Story of Inglande (1338) quoted from two lost romances about Þorgils Skarði, including that he had a brother called Fleyn. If so, Kormákr may have had the nickname Fleinn. In that case he may have founded Flamborough in Yorkshire (from Old Norse Fleinaborg). Thorgils and Kormákr came to England (ca. 965) not long after the expedition of King Harald Greycloak of Norway to Bjarmaland, today the area of Arkhangelsk in northern Russia. 
- Richard Fletcher (2004) "Bloodfeud: Murder and Revenge in Anglo-Saxon England" (Oxford University Press) ISBN 978-0195179446
- "History of Scarborough". Scarb. 26 April 2011. Retrieved April 1, 2016.
- "Origins of the Name Scarborough". discoveryorkshirecoast.com. Retrieved April 1, 2016.
- "Scarborough History : Life of a Norman Earl 1066 - 1166" Archived 2010-06-14 at the Wayback Machine yorkshire-coast.co.uk
- English, transl. W.G. Collingwood and J. Stefansson (1901). "The Saga of Cormac the Skald". Kormáks saga. Retrieved April 1, 2016.CS1 maint: uses authors parameter (link)
- Finnur Jónsson. "Kormákr Ögmundarson". Heimskringla.no. Retrieved April 1, 2016.
- Per G. Norseng Bjarmeland Store norske leksikon
- Claus Krag. "Harald 2 Eiriksson Gråfell, Konge". Norsk biografisk leksikon. Retrieved April 1, 2016.