The construction of the seaport of Milford Haven, Pembrokeshire, South Wales, is due to Greville's entrepreneurial spirit.
When it was the property of Sir William Hamilton, Greville applied for an Act of Parliament to enable Hamilton and his heirs to make docks, construct quays, establish markets, with roads and avenues to the port, to regulate the police, and make the place a station for conveying the mails.
The first structure was a coaching inn.
Quaker whaling ship owners from Nantucket were induced to settle, and for some decades Milford was a whaling port.
A royal dockyard was established during the Napoleonic Wars.
At his death in 1803, Hamilton bequeathed it to his nephew.

At a site on high ground in nearby Hakin, Greville planned to build the College of King George the Third to allow the study of mathematics and navigation, whose centrepiece would be an observatory.
 Although the observatory was built, and scientific instruments delivered, the college never functioned as such as after the death of Greville in 1809 the whole project was abandoned.
The construction of the seaport of Milford Haven, Pembrokeshire, South Wales, is due to Greville's entrepreneurial spirit. When it was the property of Sir William Hamilton, Greville applied for an Act of Parliament to enable Hamilton and his heirs to make docks, construct quays, establish markets, with roads and avenues to the port, to regulate the police, and make the place a station for conveying the mails. The first structure was a coaching inn. Quaker whaling ship owners from Nantucket were induced to settle, and for some decades Milford was a whaling port. A royal dockyard was established during the Napoleonic Wars. At his death in 1803, Hamilton bequeathed it to his nephew.
At a site on high ground in nearby Hakin, Greville planned to build the College of King George the Third to allow the study of mathematics and navigation, whose centrepiece would be an observatory.  Although the observatory was built, and scientific instruments delivered, the college never functioned as such as after the death of Greville in 1809 the whole project was abandoned.
Charles Francis Greville