Other works
Siencin Morgan to I.M. 30 Nov 1771
I.M. to Revd Evan Evans, 1 April 1779
Owen Jones to I.M., 11 July 1779
Daniel Walters to I.M., 27 June 1782
Owain Myfyr to I.M., 30 September 1782
Daniel Walters to I.M., 1 October 1782
Edward Eagleton to I.M., 3 Aug 1782
John Walters jr. to I.M., 4 March 1783
I.M. to Owen Jones, 20 September 1783
I.M. to William Meyler, 1 January 1792
Margaret Williams to I.M., 1 January 1793
Walter Davies (Gwallter Mechain) to I.M., 16 May 1793
I.M. to Edward Jones, 1 January 1794
I.M. to Revd Hugh Jones, 4 June 1794
I.M. to Margaret Williams, 27 August 1794
I.M. to Margaret Williams, 19 Feb 1794
I.M. to William Matthews, 18 July 1796
I.M. to the Board of Agriculture, 28 July 1796
William Matthews to I.M., 6 October 1796
I.M. to Sir Richard Colt Hoare, 17 August 1797
I.M. to William Owen Pughe, 20 December 1798
William Owen Pughe to I.M., 28 Aug 1800
I.M. to Owen Jones, 5 April 1806
I.M. to Taliesin Williams, 16–17 Aug 1813
I.M. to Benjamin Hall, 14 March 1816
I.M. to Magistrates at Cowbridge, 13 March 1818
William Jenkins Rees to I.M., 28 January 1822
Iolo Morganwg to David Williams, 1 January 1803
(NLW 21285E, Letter 1032, marginalia)
 "David Williams")
David Williams
Prif amseroedd a dyddiau Cadair a Gorsedd wrth Gerdd a Barddoniaeth, ac wrth fraint a defod Beirdd Ynys Prydain ydynt y pedair gwyl a gwledd arbennigion, nid amgen
Y Cyntaf, Gwyl Alban Arthan - Rhagfyr yr 21fed,
Yr Ail, Gwyl Alban Eilir - Mawrth yr 21fed,
Y Drydedd, Gwyl Alban Hefin - Mehefin yr 21fed,
A'r Pedwerydd, Gwyl Alban Elfed - Medi yr 21fed,
Ac ar y dyddiau prifwyl hynn yr ydys yn bwriadu, o hynn allan, cynnal Cadair a Gorsedd wrth Gerdd, wrth Fraint a defod Beirdd Ynys Prydain, ac ym Mraint Cadair Morganwg a Gwent ac Euas ac Erging ac Ystrad Yw. ar Bèn Bryn <Twyn> Owain ym Morganwg, yn yr amlwg, ynghlyw a golwg Gwlad ac Arlwydd, ac yn llygad haul ac wyneb goleuni.
[?page torn] Bryn Owain, yw'r Mynydd a elwir y Stalling Down [?page torn] Bont-faen,
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