[citation needed] Thomas Jackson would later contribute to the local Quaker movement by designing many of the Friends meeting houses in Northern Ireland.

[3] Jackson married Lydia Newsom Ridgeway, another member of the Waterford Quaker community, on New Year's Day 1835.

[6] Thomas's most recognised work from this period was the Old Museum building for the Belfast Natural History and Philosophical Socitety, of which he was an Honorary member.

[3][7] Jackson was fundamentally a residential architect, but over the course of his career he turned his hand to commercial, educational, industrial and ecclesiastical buildings.

The following are good examples of work by Thomas Jackson and his sons: NB: Some omissions due to lack of descriptive information.