John Marshall (1765–1845): Wealthy businessman, who developed factory-based flax-spinning in Leeds. He was a close friend of William Wordsworth through his wife Jane Pollard (1770–1847), who had been at school in Halifax with Dorothy Wordsworth. He visited the Lake District regularly following his marriage in 1795, built a country home at Hallsteads on the shores of Ullswater in 1815 and was Sheriff of Cumberland in 1821. Later, in 1832, he bought the Derwentwater Estates. Southey wrote to him in 1827 to inform him that Derwentwater was covered in flies.