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The Martineau and Taylor families of Norwich were closely related. Sarah Martineau's sons included David and Peter, who were sugar-refiners in London, and John (her fourth son) who was a brewer and became a partner in Whitbread and Co.; she was also the grandmother of Harriet Martineau, the writer, and James Martineau.
John Martineau (1789–1831), sugar refiner and mechanical engineer, married Jane Taylor (1792–1868), daughter of Samuel Taylor. They had 7 children. Their first daughter was Jane (1812–1882) who became administrator of Bedford College, London..
1821 John Martineau, Bury Couch, became a member of the Institution of Civil Engineers.
1831 the family emigrated to America but was forced to return to London following John Martineau's death on board ship.