| Reference number | CB/1/4/166 |
| Alternative reference number | BLA.H.54 |
| Level | Item |
| Title | Letter from Baron Alexander von Humboldt to Charles Blagden, Soho Square |
| Date | nd |
| Description | Letter of recommendation for Mr Aucillon, Consellor of State for the King of Prussia. |
| Language | French |
| Extent | 1 sheet |
| Format | Manuscript |
| Access status | Open |