Complex sentence: The resulting disquiet turned into something of a panic when this representative suddenly died in late November 1822, leaving the matter unresolved--the frantic buying of South American securities was abruptly replaced by equally restless selling.
Split into simpler sentences: The resulting disquiet turned into something of a panic when this representative suddenly died in late November 1822, leaving the matter unresolved. The frantic buying of South American securities was abruptly replaced by equally restless selling.