Flateyiarbók, vol.i, p. 558, cited in Anderson, Alan Orr. Early Sources of Scott...

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Flateyiarbók, vol.i, p. 558, cited in Anderson, Alan Orr. Early Sources of Scottish History A.D. 500-1286. Edinburgh: Oliver and Boyd (1922), p. 528. " The earl [Sigurd] proceeded to marry the daughter of Malcolm, the king of the Scots ; and their son was earl Thorfinn."

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