Letters to Henry Dundas, 1st Viscount Melville, and Robert Dundas, 2nd Viscount, draft replies, papers, etc., relating mainly to Indian and East India Company affairs. MSS 690-692 contain letters from Robert Dundas (many addressed To the Chair), and MSS 692-693 contain many letters from Henry Dundas. The alphabetical breakdown of the boxes is as follows:
- Eng MS 670 (box 1): Ab - Au;
- Eng MS 671 (box 2): Bai - Bar;
- Eng MS 672 (box 3): Bar - Bla;
- Eng MS 673 (box 4): Bla - Bru;
- Eng MS 674 (box 5): Bru - Cam;
- Eng MS 675 (box 6): Cam - Col;
- Eng MS 676 (box 7): Col - Cum;
- Eng MS 677 (box 8): Dal - Ell;
- Eng MS 678 (box 9): Ell - Gra;
- Eng MS 679 (box 10): Gra - Hol;
- Eng MS 680 (box 11): Hol - Ker;
- Eng MS 681 (box 12): Ker - Lus;
- Eng MS 682 (box 13): Ma - Meh;
- Eng MS 683 (box 14): Meh - Nu;
- Eng MS 684 (box 15): Oa - Pr;
- Eng MS 685 (box 16): Ra - Ry;
- Eng MS 686 (box 17): Sa - Sti;
- Eng MS 687 (box 18): Sti - Wal;
- Eng MS 688 (box 19): Wal - Wri;
- Eng MS 689 (box 20): Wri - Anon;
- Eng MS 690 (box 21): 1759 - 1845;
- Eng MS 691 (box 22): 1846 - 1943;
- Eng MS 692 (box 23): 1944 - 2046;
- Eng MS 693 (box 24): 2047 - 2114.