representative Julian's speech is very critical of the rebellion. What do you think he means when he laments about "unutterable agonies" and the "terrible sorrows?"

Based on the information provided within the question it can be said that Julian most likely means by this that the massive death tolls caused by the civil war will stay and continue to increase the pain the souls of all Americans. This goes alongside the torturous treatments of the slaves during that era in American History.