1. Oastler, Richard, 1
2. O’Brien, Stafford, 1, 2
   1. – see also as Stafford, Augustus
3. O’Brien, William Smith, 1
5. O’Connell, Daniel, 1, 2, 3, 4, 5, 6, 7;
   1. and Taunton by-election, 1, 2, 3;
   2. alliance with Whigs, 1, 2;
   3. D’s attack in Times , 1
6. O’Connell, Morgan, 1
7. O’Connor, Feargus, 1
8. O’Connor, T. P., 1
9. Opinion on the Eastern Question (Fadeyev), 1
10. Oppenheim, Henry, 1
11. Origin of Species (Darwin), 1
12. Ormsby Gore, R., 1st Baron Harlech, 1
13. Ormonde, 2nd Marquess of, 1
14. Orsini, Felice, 1, 2, 3
15. Osborne, 1, 2, 3
16. Osborne, Bernal, 1, 2n , 3
17. Osborne, Lord and Lady Godolphin, 1
18. Osman Pasha, 1, 2
19. Oude, 1, 2
20. Overend and Gurney, Messrs (bankers), 1
21. Oxford Movement, 1, 2, 3
22. Oxford University: D’s honorary DCL from, 1, 2;
    1. Gladstone’s Bill for reform of, 1