| RefNo | DM/4/11 |
| Level | Item |
| Title | Thomas Hornsby, "Copy of a paper put into His Majesty's hands by the Duke of Marlborough written by Dr Hornsby" |
| Date | c.1784 |
| Description | Stressing the importance of preciseness during the current triangular measurements between London and Paris and suggesting the measurements in England could be extended further. |
| Extent | 3 sides |
| Format | Manuscript |
| AccessStatus | Open |
| AccessConditions | OPEN - but photocopying forbidden. |
| RelatedMaterial | Cf 45 |