| Reference number | MS/232 |
| Level | SubFonds |
| Title | Thames Levelling Commission. The original observations of levels for ascertaining the distances across the channel |
| Date | c.1830 |
| Description | Bearing the signatures of Arago, Kater and Colby |
| Extent | 1 volume, MS small |
| Physical description | Paper, bound, size 7.5 x 4.75 inches |
| Access status | Open |