Complex sentence: Also in the delegation was Peisander who had never before favoured oligarchy, both having a reputation as a demagogue and playing a large part in the prosecutions of the scandals of 415 BCE.
Split into simpler sentences: Also in the delegation was Peisander who had never before favoured oligarchy, both having a reputation as a demagogue. He played a large part in the prosecutions of the scandals of 415 BCE.