Complex sentence: One of his men is captured and tortured for information, revealing that Richelieu is going to the Dovecote Inn near La Rochelle, but then drinks the poisoned wine and dies, revealing de Winter's trap.
Split into simpler sentences: One of his men is captured and tortured for information, revealing that Richelieu is going to the Dovecote Inn. Rochefort's man drinks the poisoned wine and dies, revealing de Winter's trap.