Excerpt: It has been met by former Presidents, by former Cabinets, and by former military officers. They have established a train of precedents that may be well followed at this day. I write now for the purpose of inviting attention to those principles of international law which are regarded by publicists and jurists as proper guides in the exercise of that despotic and almost unlimited authority called the "war power." A synopsis of these doctrines was given by Major General Gaines, at New Orleans, in 1838. General Jessup had captured many fugitive slaves and Indians in Florida, and had ordered them to be sent west of the Mississippi. At New Orleans, they were claimed by the owners, under legal process; but Gen. Gaines, commanding that military district, refused to deliver them to the sheriff, and appeared in court, stating his own defence. He declared that these people (men, women and children) were captured in wars and held as prisoners of war.........