| 3 | Y6 | O'Callaghan (M.S) Glories of Jesus 1835 |
| 4 | Z3 | Offering (The) a Tribute of Affection |
| 5 | Z10 | Odd Fellows' Offering 1853 |
| 6 | Y2 | Oldfield (Anne) Memoirs +c [1731] |
| 9 | H4 | Ogilvy (Mrs T) Nun of Enzklösterle 1864 |
| 10 | L9 | Xtn Lyrics by a Lady [1841] |
| 11 | Z4 | History of our B. Ld 1855 |
| 12 | L9 | Hymns for Children of the Church ND |
| 15 | Y7 | OKeeffe (A) National Characters. Lymington 1818 |
| 16 | E4 | O'Keeffe (J) World in a Village. Com. ND |
| 17 | L.2 | OKeeffe (A) Trip to the Coast 1819 |
| 18 | Z9 | Old Semibreve or Musical Instruction ND |
| 19 | | Oldfield (Mrs) Faithful Memoir of 1731 |
| 20 | M3, E7 | Olding (Ann) Sermon on +c [1776], 2d Ed, 3d |
| 21 | Y4 | Old Stories of Switzerland 1864 |
| 22 | | Old Highlander - See Fullerton |
| 24 | P.9 | Olive Branch by a Lady - Old Oak Chest See Middleton |