| RefNo | MS/131/121 |
| Previous numbers | MS.131.117 |
| Level | Item |
| Title | Schemes to Mr. Maskelyne's astronomical observations made at the Island of St. Helena |
| Description | Drawing |
| Extent | 1 drawing |
| PhysicalDescription | Ink drawing on paper |
| AccessStatus | Open |
| RelatedMaterial | According to Philosophical Transactions [Vol. 54, p. 365], the author of the drawing is J. Mynde. |