Complex sentence: Ghost illusions were the mainstay of Williams'show for almost a quarter of a century with the' ghosts' making their final appearance at Nottingham Goose Fair in October 1897.
Split into simpler sentences: Ghost illusions were the mainstay of Williams'show for almost a quarter of a century. The "ghosts" in Williams' show made their final appearance at Nottingham Goose Fair in October 1897.