Peterloo and Caribbean Slavery: The Manchester Connection Explained
Global Threads, a public history project, has studied links between the exploitation of Africans enslaved in the Caribbean and the struggles of cotton workers at Peterloo. The Guardian
On 16 August 1819, 60,000 people gathered in central Manchester to campaign for political representation. The protest at St Peter's Field ended when peaceful protesters were shot and trampled to death by the Manchester and Salford Yeomanry. The Peterloo massacre took place in 1819 at St Peter's Field in Manchester.
The fatal charge was led by yeomanry commander Hugh Hornby Birley. Global Threads research found his family fortune was closely tied to transatlantic enslavement. Birley was a member of the Portico Library in Manchester. Both men belonged to the Portico.
The other man was Sir George Philips. Philips helped fund the Manchester Guardian as a liberal reaction to Peterloo. He owned the Success plantation in Hanover, Jamaica. He too was a member of the Portico Library.
The Portico Library is an exclusive members' club. It stands a few yards from where the Peterloo massacre took place. The Global Threads project is part of research into the history of the Portico Library. Global Threads The project includes London-based Black abolitionist Robert Wedderburn, who campaigned to end slavery. That Atlantic research has been built over several years. The Global Threads project is a collaboration involving the Centre for the Study of the Legacies of British Slavery at University College. The Guardian Some researchers focused on connections between manufacturers in Manchester and enslaved people connected to cotton. Science and Industry Museum The research team traced direct links between prominent members of the Portico to slave-trading voyages, and to transatlantic slavery and colonial economies including Haiti. The Global Threads team authored 'Peterloo – A Transatlantic Moment', and the Portico offers a learning download on The Portico, Hugh Hornby Birley, and slavery in the Caribbean. The Guardian partnered with the Science and Industry Museum on a free exhibition on the links between Manchester cotton and transatlantic slavery. The Guardian
The broader context here is how institutions hold overlapping histories. A subscription library paid for by members, a provincial yeomanry, a liberal newspaper and a Jamaican plantation look like separate worlds. Membership lists and funding lines, like a shared address book, show they shared personnel, capital and social space. Political liberalism in Manchester and plantation slavery in the Caribbean were not parallel stories.
Looking at what this means for public history, the stakes concern curation and accountability. Portico-centered research uses prosopography, the study of a group through collective life stories, and property records to show how forced labour shaped civic life. Questions will follow about endowments, commemoration and teaching. For practitioners, the test is methodological. Can local collections sustain transatlantic interpretation without reducing either Peterloo or Caribbean enslavement to context for the other. The Global Threads approach keeps both in frame.
