Complex sentence: Their business flourished over the years and they also established tanneries at nearby Walkley and Philadelphia, the industry started to falter in the 19th century and eventually lost out to more established tanning areas in Walsall and Leeds.
Split into simpler sentences: Their business flourished over the years and they also established tanneries at nearby Walkley and Philadelphia. The industry started to falter in the 19th century and eventually lost out to more established tanning areas in Walsall and Leeds.