Complex sentence: The latter was worried and even contemplated the possibility that he might receive a declaration of war but to his relief Yoshizawa only handed him a draft declaration of both countries stating that the negotiations had ended without an agreement.
Split into simpler sentences: The latter was worried and even contemplated the possibility that he might receive a declaration of war. To his relief Yoshizawa only handed him a draft declaration of both countries stating that the negotiations had ended without an agreement.