| Reference number | LBO/1/42 |
| Alternative reference number | LBO/1/111 |
| Level | File |
| Title | Copy letter from Henry Oldenburg, London, to Johannes Hevelius |
| Date | 7 December 1663/1664 |
| Description | 'On the occasion of his lately published book of Mercury and Venus seen in the Sun' |
| Language | Latin |
| Extent | 4p |
| Format | Manuscript |
| Access status | Open |