Complex sentence: There were no handcuffs to be found and the prisoners seem disposed to rebel and accordingly Rodgers placed sentrys at the hatch, and armed with blunderbusses were ordered to open fire should the prisoners attempt to breach the hatch way.
Split into simpler sentences: There were no handcuffs to be found and the prisoners seem disposed to rebel. Accordingly Rodgers placed sentries at the hatch, armed with blunderbusses and under orders to open fire should the prisoners attempt to breach the hatch way.