| RefNo | RB/3/7/2 |
| Previous numbers | BL 7, no. 2 |
| Level | Item |
| Title | Unknown correspondent to Samuel Hartlib |
| Date | 11 June 1649 |
| Description | Copy in Hartlib's hand. NS: i.e., 1 June 1649 OS. |
| Language | English |
| Extent | 2 leaves, 4o |
| Format | Manuscript |
| AccessStatus | Open |
| RelatedMaterial | Summarised in 'Correspondence', vol. 6, p. 421 |