(V. ff. 159). Oct. 1805-June, 1806, and undated. includes: ff. 57, 121 Alexander Marsden, Under-Secretary for Ireland: Letters to D. Campbell: 1805-1806.
(II. ff. 165). Jan. 1803-June, 1804. includes: f. 12 Alexander Marsden, Under-Secretary for Ireland: Letter to Dr. Lindsay: [1803 ?]. f. 137 Alexander Marsden, Under-Secretary for Ireland: Letter to Col. Beckwith: 1804.
(III. ff. 191). July, 1804-Jan. 1805. includes: ff. 43-96 Ignaz Joseph Pleyel, composer and music publisher: Chamber sonatas: 1804, 1805. f. 159 Alexander Marsden, Under-Secretary for Ireland: Letter to Admiral Pakenham: 1805.: Copy.
(I. ff. 207). 1802. includes: ff. 10, 41 Alexander Marsden, Under-Secretary for Ireland: Letters to C. Abbot: 1801-1802. f. 72 b Alexander Marsden, Under-Secretary for Ireland: Correspondence with Sir G. Shee: 1802-1803. f. 74 Sir George Shee, Baronet; Under Secretary of State: Correspondence ...