Born in 1845 on the island of St. Croix, Danish West Indies, Alexander Henderson was a boy who yearned to go to sea and see the world. For his first long voyage, he signed up to sail to New York. Upon arrival, to his shock and surprise, he discovered that slavery was still in effect in the United States, and joined the Union Navy to help in destroying it.On Blockade is a colorfully written memoir of his experiences, relationships and duties aboard...