Complex sentence: Latterly she was resident for a long period at Benson, Oxfordshire, and completed a thorough history of it in 1918 that circulated in typescript and was published posthumously in 2009 with addenda of information on subsequent archaeological research and of early maps.
Split into simpler sentences: Latterly she was resident for a long period at Benson, Oxfordshire, and completed a thorough history of it in 1918. This circulated in typescript and was published posthumously in 2009, with addenda of information on subsequent archaeological research and of early maps.