| Reference number | LBO/1/59 |
| Alternative reference number | LBO/1/165 |
| Level | File |
| Title | Copy letter from Henry Oldenburg, London, to Johannes Helvelius |
| Date | 11 May 1664 |
| Description | An answer to a letter sent by Helvelius dated 4 January 1664 [See LBO/1/43] |
| Language | Latin |
| Extent | 5p |
| Access status | Open |
| Related material | LBO/1/43 |