""A Postscript to the Section on Iron Defenses: Contained in the Fifth Edition of Naval Gunnery (1861)"" by Howard Douglas is a book that provides additional information on iron defenses in naval warfare. The book is a supplement to the fifth edition of ""Naval Gunnery"" and includes updates and new findings on the subject of iron defenses. The author, Howard Douglas, was a British naval officer and expert in naval warfare. The book covers topics...