Complex sentence: Hennessey, Gardner and others sought help from Freddie Foreman after the altercation and, although most of the gang were arrested, some were put up by Foreman until things had blown over.
Split into simpler sentences: Hennessey, Gardner and others sought help from Freddie Foreman after the altercation. Although most of the gang were arrested some were put up by Foreman until things had blown over.