... the 19th and 27th of April, 1861, President Lincoln proclaimed the blockade of the coast of the Confederacy, extending from the Potomac to the Rio Grande, embracing, according to the returns of the United States Coast Survey, a coast line of three thousand five hundred and forty-nine statute miles, on which the number of rivers, bays, harbors, intents, sounds, and passes is one hundred and eighty-nine. The...