Complex sentence: The next morning Mrs Rogers is found dead in her bed having died in her sleep from an overdose of chloral hydrate, and by lunchtime General MacArthur is found dead, from a heavy blow to his head.
Split into simpler sentences: The next morning, Mrs Rogers' corpse is found in her bed; she had died in her sleep from an overdose of chloral hydrate. By lunchtime, General MacArthur is found dead, from a heavy blow to his head.