sentences:  On his return to London, Moloney learned that Thomson had not tried to reach Katanga again.The British Government had quietly ordered him not to go.The expedition had only survived through the strength and endurance of the Zanzibari porters and askaris, as well as the tendency of a loyal core of them, epitomised by Hamadi bin Malum, to come to the rescue when mutiny, treachery, robbery or some other disaster threatened.