Complex sentence: As Geoghegan remarks, it is likely that a few of the accused were guilty at least of the attack on Norcott, but that most of the 21 were innocent; the great danger was that no distinction would be made between innocent and guilty.
Split into simpler sentences: As Geoghegan remarks, it is likely that a few of the accused were guilty at least of the attack on Norcott, but that most of the 21 were innocent. The danger was that no distinction would be made between innocent and guilty.