 Only one man, a Border Ruffian, was killed.Preston Brooks's caning of anti-slavery Senator Charles Sumner in the United States Senate also fueled Brown's anger.A pro-slavery writer, Benjamin Franklin Stringfellow, of the "Squatter Sovereign", wrote that "[pro-slavery forces] are determined to repel this Northern invasion, and make Kansas a slave state; though our rivers should be covered with the blood of their victims, and the carcasses of the abolitionists should be so numerous in the territory as to breed disease and sickness, we will not be deterred from our purpose".