An adventure and tale of derring-do for boys set during the Siege of Rhodes and the heroic defense of the Island by the Knights of Saint John. The Knights of Saint John are a Military-Religious Order of the Catholic Church charged with the defense of Christendom from Moslem imperialism. They and the Knights Templar are among the main reasons why Christendom was able to hold off Moslem conquest in the Levant for over 200 years. G. A. Henty was a popular British writer of books for boys in the late 19th Century. He also wrote of American heroes, and others, as well. This book is the second in a series of "Books For Boys" by various authors who promote the cause of manhood, courage, devotion to the cause, patriotism and the Christian Faith.