The Hidden Connections exhibition was a result of partnership between the Public Record Office of Northern Ireland (PRONI) and the Linen Hall Library in Belfast. The exhibition explored Ulster's links with slavery after 1807 via people, events and places, and looked at both the pro and anti-slavery debates in Northern Ireland. It drew on documents from PRONI’s archives, artefacts from the Ulster Museum and contemporary books and pamphlets from the Linen Hall Library and elsewhere. After its launch at Linen Hall Library, the exhibition toured Northern Ireland, travelling to Down Museum, the Harbour Museum in Derry, Lisburn City Library and the Ulster American Folk Park.

The wider Hidden Connections programme featured workshops exploring archival sources, performances and lectures by leading scholars. There was a panel discussion on ‘Slavery Now’, a walking tour of Belfast sites associated with the slavery issue, and a boat trip on the Lagan focusing on the port’s links with slave colonies. Gerry McLaughlin’s ‘Blood sugar’ is a drama documentary devoted to the literature of slavery, music and song. 'Freedom and Liberty' was the theme of the UK-wide Archives Awareness Event. PRONI organised special events and produced a catalogue, 'Ulster and Slavery', listing the references to slavery to be found in the archive.