Richard Oastler 'The Factory King' was born in St Peter's Square. His 1830 letter to the Leeds Mercury about 'Yorkshire Slavery' began the campaign to reduce the working day of factory children to ten hours. The Ten Hours Act of 1847 owed much to his persuasive writing and compelling oratory.
Richard Oastler (20 December 1789 - 22 August 1861) was an English labour reformer, "Tory radical", and abolitionist. He fought for the rights of working children in the Factory Act of 1847, and was also a prominent leader of the Factory reform and anti-Poor Law movement.