Final answer:
The provided references do not contain information about Fr. Coindre or the identity of the Second Superior General, therefore it's not possible to accurately answer the question based on the given texts.
Step-by-step explanation:
The question regarding who succeeded Fr. Coindre as the Second Superior General isn't directly answered by the provided reference texts. Both texts refer to historical events—the Second Crusade and the execution of Father Dupièreux—but do not mention Fr. Coindre or the succession of the Second Superior General. Given this, I am unable to provide an accurate answer to the question about Fr. Coindre's successor as Second Superior General based on the information given.