Some individuals who lived at the Green during this period included Thomas Rees, the minister after Barbauld, who was a leading authority of the history of Unitarianism, and made connections with the Unitarian Church of Transylvania. Alexander Gilchrist, son of another minister, was the biographer of William Blake. Andrew Pritchard improved the microscope and studied microscopic organisms; he was a friend of Michael Faraday and for him, science and religion were one. He led the Newington Green Conversation Society, membership restricted to 16, a successor to the Mutual Instruction Society. Marian Pritchard is described as an unsung heroine, and "one of the leaders of modern Unitarianism". She set up Oxford Summer Schools for the training of Sunday School teachers and Winifred House Invalid Children's Convalescent Home. John Stuart Mill recalls his family living in Newington Green "from 1810 to the end of 1813"; it was at the time "an almost rustic neighbourhood", and it was during walks with his father before breakfast "generally in the green lanes towards Hornsey" ("my earliest recollections of green fields and wild flowers") that John Stuart would recount to James Mill what he had learnt reading the previous day.