Complex sentence: Ellwood's account of his own life ceased in July 1683, when he was protesting against the injustice of treating Quaker meetings as riotous assemblies, and had himself just been threatened with prosecution for seditious libel because he had warned the constables to beware of informers.
Split into simpler sentences: Ellwood's account of his own life stopped in July 1683, when he was protesting against the injustice of treating Quaker meetings as riotous assemblies. He had just been threatened with prosecution for seditious libel because he had warned the constables to beware of informers.