"About a month after the battle, Stone returned two runaway slaves to their Maryland master. The Federal Fugitive Slave Law, Maryland's state fugitive slave law, and Lincoln Administration policy all demanded that he do this."
"On December 18, Sumner attacked him in a speech on the Senate floor, totally ignoring the fact that Stone was obliged to uphold existing law. Sumner apparently also was writing to officers under Stone encouraging them to disobey any future orders to return slaves."