| RefNo | RB/1/8/25 | 
| Previous numbers | BP 8, fols. 190-5 | 
| Level | Item | 
| Title | MS version of section 7 of Essay I of 'Usefulness, II, sect. 2'. | 
| Date | 1660s; 1650s or early 1660s (192a) | 
| Description | Incorporating material from an earlier recension (fols. 192-3); printed text has some other additions, including text from BP 10, fol. 93.\r\nHand: F, rounded 1650s (192a). | 
| Language | English | 
| Extent | Fols. 190-5 (6 leaves) | 
| Format | Manuscript | 
| AccessStatus | Open | 
| RelatedMaterial | 'Works', vol. 6, pp. 432-5. |