| RefNo | RB/1/9/27 |
| Previous numbers | BP 9, fols. 162-3 |
| Level | Item |
| Title | Part of unpublished 'Essay XIII' of 'Usefulness'. |
| Date | 1660s |
| Description | Endorsed 'This belongs to the Essay of the unpublished part of Usefulnes'.\r\nHand: G |
| Language | English |
| Extent | Fols. 162-3 (2 leaves) |
| Format | Manuscript |
| AccessStatus | Open |
| RelatedMaterial | 'Works', vol. 13, pp. 353-4.\r\nSee also BP 10, fols. 27-8; BP 24, pp. 375-85; BP 28, pp. 293-5; and BP 29, fols. 207-18. |