Advantage was soon taken of the Emir's concession. Notice was given to the Baggara guard, and one afternoon, guarded by six mounted men, Frank, the professor, and Sam, attended by the Sheikh, mounted their camels and rode out of the palace gates to inspect the city and a part of its surroundings, with which, from the freedom he had already enjoyed, Ibrahim was becoming pretty well acquainted. As soon as they started, the guard fell back to the rear, contenting themselves with following, and leaving the Sheikh to take whatever course he chose, so that he led, with Frank at his side, talking to him in a low voice as if describing all they saw to his dumb companion, who questioned him from time to time with his eager eyes. Long experience as dragoman and guide had made the old man wonderfully intelligent and apt to comprehend his employer's desires, and that he did so now was shown at the first start. "Which way am I going, Ben Eddin?" he said quietly. "Through the better parts of the city, where the wealthier people are, who keep slaves," and in a few minutes Frank was gazing about him with horror as he asked himself what must the worst parts of the place be if these were the best. For eyes and nostrils were disgusted at every turn. The heat was intense, and wherever any creature died or the offal of the inhabitants' food was cast out into the narrow ways, there it festered and rotted beneath the torrid rays of the sun, while myriads of loathsome flies, really a blessing to the place in their natural duty of scavengers, rose in clouds, and to hurry from one plague was only to rush into another. Misery, neglect, and wretchedness appeared on every hand; but the population swarmed, and habit seemed to have hardened them to the power of existing where it appeared to be a certainty that some pestilence must rise and sweep them off. Frank was not long in discriminating between the free and the enslaved. Those swarthy, black often and shining, sauntering about well-armed, and with a haughty, insolent bearing and stare at the mounted party; these dull of eye and skin, cringing, dejected, half naked, and often displaying the marks of the brutality of their conquerors, as they bent under heavy loads or passed on with the roughest of agricultural implements to and from the outskirts of the town. "Plenty of slaves, Ben Eddin," said the Sheikh gravely. "Poor wretches, swept in from the villages to grow the Baggara's corn and draw and carry their water. They spare their camels to make these people bear the loads. Plenty of slaves. Look!"