| RefNo | RB/1/18/47 |
| Previous numbers | BP 18, fols. 122-4 |
| Level | Item |
| Title | 'Of Subterraneal Steams' |
| Date | ? 1660s |
| Description | Earlier version of last section of BP 21, pp. 87-153.\r\nHand: Uncertain |
| Language | English |
| Extent | Fols. 122-4 (3 leaves) |
| Format | Manuscript |
| AccessStatus | Open |
| RelatedMaterial | Published in 'Works', vol. 13, pp. 419-23. \r\nSee also BP 21, 87-153. |