| Reference number | LBO/6/14 |
| Alternative reference number | LBO/6/41 |
| Level | File |
| Title | Copy letter from John Flamsteed, Derby, to Henry Oldenburg |
| Date | 17 February 1672/1673 |
| Description | ' Concerning Heclerus his calculus of Mercury's Transit over the Sun to be in the year 1674, the 6th of May. ' |
| Extent | 2p |
| Format | Mimeograph |
| Access status | Open |