| Repository | Archives of the Archbishop of Westminster |
| Ref No | AAW/DOW/AP/1/2/125 |
| Title | Apostolic Letter regarding the New Hierarchy |
| Date | October 1850 |
| Level | Item |
| Description | Letter from Pope Pius P.P.IX to Archbishop Wiseman relating to the administration of the new Hierarchical Sees. |
| Format | Manuscript |
| Language | Latin |