Complex sentence: On hearing the news, Nicholaes exclaims that Diogenes return is impossible but won't say any more when questioned, he then tries to get the Stadtholder away before he can talk to the Englishman, insiting that Diogenes has sold his sword to the Archduchess.
Split into simpler sentences: On hearing the news, Nicholaes exclaims that Diogenes return is impossible but won't say any more when questioned. He then tries to get the Stadtholder away before he can talk to the Englishman, insisting that Diogenes has sold his sword to the Archduchess.