Complex sentence: Before her death in 1732, Benjamin Hoskins Styles, who had made a fortune in The South Sea Company before the notorious Bubble burst, purchased it; the current appearance of the mansion can be traced to him.
Split into simpler sentences: Before her death in 1732, Benjamin Hoskins Styles, who had made a fortune in The South Sea Company before the notorious Bubble burst, purchased it. The current appearance of the mansion can be traced to him.