| Reference number | LBO/4/135 |
| Alternative reference number | LBO/4/352 |
| Level | File |
| Title | Copy letter from Jean Dominique Cassini to Henry Oldenburg |
| Date | 20 August 1671 |
| Description | ' Signor Cassinus's Letter Accompanying his printed Account concerning the present spots in the Sun, together with that of his observations of Saturn's Ring. ' |
| Language | Latin |
| Extent | 1p |
| Format | Manuscript |
| Access status | Open |