The contents are as follows:

(i) Letters, 1851-1858, of the Marquess of Dalhousie to the 10th Marquess of Tweeddale as Deputy Commissioner of Simla and Superintendent of the Hill States (folio 1);

(ii) Letters, 1857-1858, undated, concerning the Indian Mutiny to the 10th Marquess of Tweeddale at Simla, including many letters of Lieutenant Charles Theophilus Metcalfe McDowell, 2nd European Regiment, Other correspondents include Alexander Bagot, George Carnac Barnes, Arthur Mitford Becher, Sir Edward Fitzgerald Campbell, George Campbell, Kendal Josiah William Coghill, John Laird Mair Lawrence and Henry Tombs (folio 74).