Complex sentence: After the Napoleonic War Augustus Siebe moved to London in England and settled at 5 Denmark Street in Soho in London, where he became an engineer; he was joined by his son-in-law, William Augustus Gorman who had married his daughter Mary.
Split into simpler sentences: After the Napoleonic War Augustus Siebe moved to London in England and settled at 5 Denmark Street in Soho in London, where he became an engineer. He was joined by his son-in-law, William Augustus Gorman who had married his daughter Mary.