Complex sentence: James John Garth Wilkinson (June 3,1812-October 18,1899), Swedenborgian writer, the son of James John Wilkinson (died 1845), a writer on mercantile law and judge of the County Palatine of Durham, was born in London.
Split into simpler sentences: James John Garth Wilkinson (June 3,1812-October 18,1899), was a Swedenborgian writer. The son of James John Wilkinson (died 1845), a writer on mercantile law and judge of the County Palatine of Durham, he was born in London.