Knight of the White Cross - a tale of the siege of Rhodes

In "A Knight Of The White Cross", G.A. Henty writes about the Knights of St. John and their successful defense of Rhodes during the first siege by the Turks at the end of the 15th century. After the fall of Jerusalem to the Moslems, the Knights of St. John established themselves at Acre, then at Crete, and then at Rhodes.  Finally, dislodged from Rhodes by the second Turkish siege, they fortified ...