Complex sentence: Africanus's will also indicates that granddaughter, Sarah Ann Cropper, was "afflicted" in some unstated way; she died at the age of 17, so may have had a serious illness.
Split into simpler sentences: Africanus's will also indicates that granddaughter, Sarah Ann Cropper, was "afflicted" in some unstated way. Sarah died at the age of 17, so she may have had a serious illness.