Kammala jumla mai zuwa: A lokacin yakin Boer na biyu ya zama mai ba da agaji a gefen Boers kuma ya yi yaƙi a yaƙe-yaƙe daban-daban, gami da Spion Kop da
Paardeberg. (A cikin harshen Turanci) An kama shi a matsayin fursuna bayan da aka ci nasara da Boers. A lokacin da aka kama Costas, an kai shi sansanin fursunoni a British Ceylon.