Joseph Haughton and Catherine Potter

The second daughter of John Potter was Catherine Potter (1752-1813). She married Joseph Haughton in 1799. 

Of Joseph Haughton, the County Down site of Ros Davies records that he was a sailing master who arrived in Downpatrick in 1778 from the West Indies. According to Blackwood he died on 'The Hill' in 1827 and was buried in Downpatrick Church.

As a sailing master with Caribbean connections, there is naturally a possibility that he too was part of the smuggling consortium with sugar being an obvious possible product. 

Ballydugan Mill today. Copied from:
http://www.top100attractions.com/attractions/item/the-mill-at-ballydugan

John, like his father-in-law, was a member of the Downpatrick Whig Club in 1790, and a member in the partnership along with John Auchinleck, Thomas Nevin, John Potter and James Crawford that built and then operated the Ballydugan Flour Mill.

In 1795, Joseph was listed as one of the executors of the will of John Dun of Downpatrick; the other executors were Thomas Nevin and Alexander Gracey. This was probably an ancestor of the Thomas Gracey named in Harriett Wombwell's will as owing her one thousand pounds.

Catherine Potter died in 1813, aged sixty-one.