Miscellaneous papers collected by Iolo Morganwg (and a few by Taliesin ab Iolo), comprising: an account of 'The state of the cause concerning the president and Councell established in the Marches of Wales', [?1641] (E13/1); a copy of the declaration of Prince Rupert, Shropshire, 6 May 1644, concerning the intent of the Commission of Marshal Law given by him to Sir John Mennes in the counties of Carnarvonshire, Merioneth and Anglesey (E13/2); a grant of a barn or cowhouse called Ty Pen y Twyn in Ystradyvoducke [sic], Glamorgan, 20 January 1653/4 (E13/3); a catalogue of books from unidentified library, [?17 cent, second ½] (E13/4, incomplete); a volume of sermon notes and/or Biblical commentary, [?late 17 cent. x early 18 cent] (E13/5, incomplete); a confirmation by Friedrich Augustus, King of Poland, etc., of appointment of a 'Geleitsmann', Dresden, 30 October 1703 (E13/6); a notebook containing a manuscript copy, [c. 1746], of the pamphlet An Appeal from the Late David Morgan Esqr … (London, 1746, ESTC T59776) (E13/7); lease of a plot of ground in the parish of Rumpney [sic], Monmouthshire, 24 March 1752 (E13/8); a rental of 'Dunraven Estate for the year 1756', [?1756] (E13/9); a schedule of land tax in Glamorgan for the year 1662, with a table giving the rate of tax from 1688 to 1759, [?1759] (E13/10); part of a deposition, [?1760s], by the unnamed tenant of land once owned by the late Miles Llewellin (junior) of Llantrisant, Glamorgan, concerning an unspecified dispute (ff. 28-30 only) (E13/11); draft particulars of lands belonging to John Bedford to be made a mortgage of the Hon. Board of Ordnance, providing a furnace and tools, [?1780] (E13/12); copy of a deed relating to [?a Unitarian meeting house] in Neath, 1814 (E13/13); a [?proof] copy of a reprinting, by W. Williams, printer, Merthyr Tydfil, of William Cobbett's address 'To the Journeymen and Labourers of England, Wales, Scotland, and Ireland…', [?1816] (E13/14); and three copies, 1816-1824, of English translations of two charters relating to the town of Aberavon (dated 1350 and 1373) (E13/15-17).