Alexander Mitchell
1837 Alexander Mitchell of Belfast, builder of lighthouses, became a member of the Institution of Civil Engineers.[1]
1846 Patent '...Patent for England, bearing date at Westminster, the 4th day of July 1833, and in the fourth year of the reign of His late Majesty King William the Fourth, granted to Alexander Mitchell, then of Brickfield, in the parish of Ballymacarrett, county of Down, but now of Belfast, in Ireland, Civil Engineer, for a certain invention of a dock of improved construction, to facilitate the repairing, building, or retaining of ships and other floating vessels, certain parts employed in the construction of the said dock, being also applicable to other purposes; and also in the matter of Letters Patent for Ireland, granted to the said Alexander Mitchell, bearing date at Dublin, the 13th day of September, in the year aforesaid...' [2]