"From Sail to Steam, Recollections of Naval Life" is the memoir of Anthony T. Mahan about his time in the navy in the 19th century. Mahan's father was a professor at the famous West Point Military Academy, New York in the United States. Through his connection, he entered the Naval Academy, as an "acting midshipman" in 1856. He opines, "Naval officers who began their career in the fifties of the past century, as I did, and who survive till now, as very many do, have been observant, if inconspicuous, witnesses of one of the most rapid and revolutionary changes that naval science and warfare have ever undergone. It has been aptly said that a naval captain who fought the Invincible Armada would have been more at home in the typical war-ship of 1840, than the average captain of 1840 would have been in the advanced types of the American Civil War. The twenty years here chosen for comparison cover the middle period of the century which has but recently expired. Since that time progress has gone on in accelerating ratio; and if the consequent changes have been less radical in kind, they have been more extensive in scope. It is interesting to observe that within the same two decades, in 1854, occurred the formal visit of Commodore Perry to Japan, and the negotiations of the treaty bringing her fairly within the movement of Western civilization; starting her upon the path which has resulted in the most striking illustration yet given of the powers of modern naval instruments, ships and weapons, diligently developed and elaborated during the period that has since elapsed."