As soon as the blockade was established, the British and French governments gave the Confederates the same rights in their ports as the United States had. The Southerners then sent two agents, Mason and Slidell, to Europe to ask the foreign governments to recognize the independence of the Confederate states. Captain Wilkes of the United States ship San Jacinto took these agents from the British steamer Trent. But Lincoln at once said that Wilkes had done to the British the very thing which we had fought the War of 1812 to prevent the British doing to us. "We must stick to American principles," said the President, "and restore the prisoners." They were given up. But the British government, without waiting to see what Lincoln would do, had gone actively to work to prepare for war. This seemed so little friendly that the people of the United States were greatly irritated.

It will be remembered that the Republican party had denied again and again that it had any intention to interfere with slavery in the states. As long as peace lasted the Federal government could not interfere with slavery in the states. But when war broke out, the President, as commander-in-chief, could do anything to distress and weaken the enemy. If freeing the slaves in the seceded states would injure the secessionists, he had a perfect right to do it. But Lincoln knew that public opinion in the North would not approve this action. He would follow Northern sentiment in this matter, and not force it.