In 2018 Ainsley McIntosh produced a critical edition of Marmion: A Tale of Flodden Field as the second volume (the first to appear) of The Edinburgh Edition of Walter Scott's Poetry, published by Edinburgh University Press. Many further editions followed, both individual and collected, and in 1830 Scott provided the poem with a new introduction. Scott produced small refinements for the text of the verse and larger updatings for the notes in the second edition and third editions (3,000 copies each) published later in the year. It cost one and a half guineas (£1 11s 6d or £1.57½), and 2,000 copies were printed. Marmion was published in Edinburgh by Archibald Constable on 22 February 1808, and in London by William Miller and John Murray on 8 March. He told his son-in-law, Lockhart: 'Oh, man, I had many a grand gallop among these braes when I was thinking of Marmion.' The poem took much longer to compose than Scott had hoped: he was held up by personal and family difficulties and other occupations, and it was probably January 1808 before it was finished. Murray observed: 'We both view it as honourable, profitable, and glorious to be concerned in the publication of a new poem by Walter Scott.' Scott said that he thoroughly enjoyed writing the work. William Miller and John Murray each agreed to take a 25% share in the project.

On 30 January 1807 Archibald Constable concluded an agreement to pay 1,000 guineas (£1,050) for the copyright: the sum may have originated with Scott in previous negotiations with Longman. Moreover, Surtees sent Scott two forgeries of his own, an account in Latin of a ghostly combat and a ballad, both of which also appear in the poem.

At this time Scott was entering into correspondence with the Durham antiquary Robert Surtees, and in December they discussed the account given by Robert Lindsay of Pitscottie of the supernatural summons of James IV and several of his nobles to appear before Pluto, which Scott uses in the fifth canto: Scott refers to his developing poem, so it is clear that the overall shape of the work was clear from the outset.

The introductory epistle to the first canto of Marmion is internally dated November, and there is no reason to doubt that it was written in that month of 1806.

Oh what a tangled web we weave