Chapter LII: More Conquests By The Arabs.—Part I. Part II. Part III. Part IV. Part V

The Two Sieges Of Constantinople By The Arabs.—Their
Invasion Of France, And Defeat By Charles Martel.—Civil War
Of The Ommiades And Abbassides.—Learning Of The Arabs.—
Luxury Of The Caliphs.—Naval Enterprises On Crete, Sicily,
And Rome.—Decay And Division Of The Empire Of The Caliphs.—
Defeats And Victories Of The Greek Emperors.