Complex sentence: During the 19th century, the supply and maintenance depot for ships at Stanley developed into a port serving ships rounding Cape Horn, and trade in cow hides from the wild descendants of cattle introduced by French settlers in the late 18th century.
Split into simpler sentences: During the 19th century, the supply and maintenance depot for ships at Stanley developed into a port serving ships rounding Cape Horn. There was also trade in cow hides from the wild descendants of cattle introduced by French settlers in the late 18th century.