| Reference number | LBO/20/48 |
| Alternative reference number | LBO/20/149 |
| Level | File |
| Title | Copy letter from Roger Williams to the Royal Society |
| Date | nd |
| Description | ' Concerning an Instrument for finding the Longitude at Sea. '
Read at the Royal Society 3 May 1733 |
| Extent | 1p |
| Format | Manuscript |
| Access status | Open |