Siege of Khartoum was given a credit of £100,000 and was promised by the British and Egyptian authorities "all support and cooperation in their power.". On his way to Khartoum with his assistant, Colonel Stewart, Gordon stopped in Berber to address an assembly of tribal chiefs. Here he committed a cardinal mistake by revealing that the Egyptian government wished to withdraw from Sudan. The tribesmen became worried by this news, and their loyalty wavered. Gordon arrived at Khartoum on 18 February 1884, but instead of organising the evacuation of the garrisons, set about administering the city. His first decisions were to reduce the
HMS Khartoum (F45) and the sloop in search for "Torricelli" near Perim Island. After interception, "Khartoum" and these warships took part in a surface engagement with the submarine, during which "Torricelli" was sunk and "Shoreham" damaged. However, during the battle, "Khartoum" was hit by return fire which damaged the after torpedo tube mounting. Some five and a half hours later, at 11.50am (local time), a torpedo's compressed air chamber exploded, propelling the warhead through the deck house of number 3 4.7-inch mount. and causing a serious uncontrollable fire from a ruptured oil tank there. This resulted in an explosion of the ship's artillery