Gordon was "watching his armour" now. Often he saw no one for weeks at a time. He prayed much, and the books he read were his Bible, his Prayer Book, Thomas a Kempis, and Marcus Aurelius. He wandered over the ground where the feet of the Master he served so well had trod before him. He was much in Jerusalem. He went to where the grey olives grow in the Garden of Gethsemane. His own Gethsemane was still to come. In those quiet days he planned great work that he meant to do in the East End of London. But there was other work for him to do. "We have nothing to do when the scroll of events is unrolled but to accept them as being for the best," he once wrote. In December 1883 he suddenly returned to London, and soon it was known that he was going, at the request of the King of the Belgians, to the Congo, to help to fight the slavers there. "We will kill them in their haunts," said Gordon. Meantime, fresh things had been happening in the Soudan. When Gordon left Egypt in 1879, he said to an English official there: "I shall go, and you must get a man to succeed me--if you can. But I do not deny that he will want three qualifications which are seldom found together. First, he must have my iron constitution; for Khartoum is too much for any one who has not. Then, he must have my contempt for money; otherwise the people will never believe in his sincerity. Lastly, he must have my contempt for death." Such a man was not found, and well might the black people long for the return of Gordon Pasha, the only Christian for whom they offered prayers at Mecca. When he went away, under the rule of the greedy Egyptian pashas the slave trade began again. Once more packed caravans of wretched slaves dragged across the desert, and the land was full of misery and of rebellion. In 1881 the discontented Soudanese found a leader. From the island of Abbas on the Nile, Mahommed Ahmed, a dervish or holy man, from Dongola, proclaimed to the people of Egypt and of the Soudan that he was a prophet sent from heaven to save them from the cruelty of their rulers. _El Mahdi el Muntazer_, or The Expected One, he called himself, and said he was immortal and would never die. Soon he had many followers. He was attended by soldiers, who stood in his presence with drawn swords, and he had all the power of a king. Because he was Mahdi, his followers all had to obey him. And as he was Mahdi, he himself did exactly as he pleased, and what he liked to do was all that was wicked and cruel. The Governor-General at Khartoum, seeing that the Mahdi was growing much too powerful, sent two companies of soldiers to take him prisoner. The Mahdists made a trap for them, fell on them with their swords and short stabbing spears, and destroyed them. More troops were sent, and also destroyed. Then came a small army, and of that army almost no man escaped.