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Referenced multiple times throughout as the primary source for the Battle of Stamford Bridge narrative. Described as 'the saga of King Harold' and 'the definitive, in fact, pretty much the only account we have of the Battle of Stamford Bridge.'

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Referenced as a historical source providing a 'first draft of history' about Tostig's movements and the events of 1066, contrasted with the more dramatic saga accounts.

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Mentioned as a source commissioned by Tostig's sister, which describes Tostig as being short, contrasting with the sagas' description of him as tall.

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Referenced as 'Morkinskin' when quoting about the Battle of Fulford: 'no greater slaughter will ever be inflicted on a brave army.'

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Explicitly mentioned as a book by Tom Shippey, 'great scholar of Norse literature, great Tolkien scholar,' who argues it's implausible that Harald Hardrada would have left his armor behind.

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Explicitly referenced as 'Don Holway in his book, The Last Viking about Harold Hardrada' when estimating the travel time to Stamford Bridge.

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Referenced when comparing Harald Hardrada's death scene to Boromir's death at 'Parth Garland' and when quoting a passage about the Battle of Pelennor Fields adapted to describe the aftermath of Stamford Bridge.