| Conspectus Call # ranges | Subject | Level |
| BL-BX | History of Religion | 3 |
| CD | Diplomatics. Seals, Archives | 3a |
| CR | Heraldry | 0 |
| CS | Genealogy | 2 |
| DA 10-18 | British Empire | 3b |
| DA 20-134 | England | 3b |
| DA 135-162 | England to 1066 | 3b |
| DA 170-260 | England, Medieval 1066-1485 | 3b |
| DA 300-463 | England, Tudor/Stuart | 3b |
| DA 480-522 | England, 18th C. | 3b |
| DA 529-565 | England, 19th C. | 3b |
| DA 566-592 | England, 20th C. | 3b |
| DA 593-670 | England, descript/travel | 3a |
| DA 670-690 | England, local hist/descript. | 3a |
| DA 700-738 | Wales | 3a |
| DA 740-745 | Wales, local hist/descript | 2 |
| DA 750-878 | Scotland | 3a |
| DA 880-890 | Scotland, local hist/descript | 2 |
| DA 900-988 | Ireland | 3b |
| DA 990-995 | Ireland, local hist/descript | 2 |
| G | British geography and maps | 3 |
| HB | English population/demography | 3a |
| Welsh population/demography | 3 | |
| Scots population/demography | 3 | |
| Irish population/demography | 3a | |
| HC-HD | British/Irish economic hist. | 3b |
| HN-HV | British/Irish social hist. | 3b |
| HX | British/Irish socialism, communism, Leftist parties | 3a |
| JN | British/Irish constitutional/pol. hist | 3a |
| K | British legal history | 3 |
| LA | British/Irish hist, of education | 3 |
| PN,PR | British and Irish literature | 3a-b |
| SB | British landscape, parks, gardens | 3b |
| U-V | British military/naval history | 3a |
| Z | British bibliography (mostly in A-V) | 3b |