David Elder
Dates
| / /1821 | David Elder Joins Robert Napier as manager of his works. |
| / /1848 | John Elder Son of David Elder, joins Robert Napier as draughtsman and invents the Compound Steam Engine. |
| / /1821 | David Elder Joins Robert Napier as manager of his works. |
| / /1848 | John Elder Son of David Elder, joins Robert Napier as draughtsman and invents the Compound Steam Engine. |