| Reference number | CB/1/4/167 |
| Alternative reference number | BLA.H.55 |
| Level | Item |
| Title | Letter from Baron Alexander von Humboldt, London to Charles Blagden |
| Date | nd |
| Description | Letter of recommendation for Mr Appert who has discovered the way to conserve milk, fish and meat |
| Language | French |
| Extent | 1 sheet |
| Format | Manuscript |
| Access status | Open |