The letters are to John Murray II and John Murray III. They concern Thomas Mitchell’s literary and political interests, and his editing of various classical texts, particularly those of Aristophanes. The letters also indicate Mitchell’s familiar association with the Murrays.

The letters are arranged chronologically.

1840-1841: folios 1-25;

1842: folios 26-57;

1843: folios 58-82;

1844-1845: folios 83-104.