| RefNo | AP/24/17/4 |
| Level | Item |
| Title | Unpublished figure, Nine-Pin Rock by John Robertson |
| Creator | Robertson; John (fl 1840) |
| Date | 6 February 1840 |
| Description | A figure in coloured ink showing a view of the island of Trinidad, in which Nine-Pin Rock is visible.
Subject: Geology |
| Extent | 1p |
| Format | Manuscript |
| PhysicalDescription | Ink on paper |
| AccessStatus | Open |