Complex sentence: Whiting's brother Jasper died of illness in Confederate service, and brother Robert was in charge of Green-Wood Cemetery, the one which Whiting was originally interred, during the 1860s.
Split into simpler sentences: Whiting's brother Jasper died of illness in Confederate service. Another brother, Robert, was in charge of Green-Wood Cemetery, the one in which Whiting was originally interred in the 1860s.