Chapter 36 A Throng of People on the Horizon.—A Troop of Arabs.—The Pursuit. —It is He.—Fall from Horse-back.—The Strangled Arab.—A Ball from Kennedy.—Adroit Manoeuvres.—Caught up fly-ing.—Joe saved at last. From the moment when Kennedy resumed his post of obser-vation in the front of the car, he had not ceased to watch the horizon with his utmost attention. After the lapse of some time he turned toward the doctor and said: "If I am not greatly mistaken I can see, off yonder in the dis-tance, a throng of men or animals moving. It is impossible to make them out yet, but