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16. For every slave thus brought to Zanzibar, the Sultan receives a royalty of two dollars, and it is therefore manifest that for any assistance he may offer in the suppression of the trade, he expects, as the lawyers say, "a valuable consideration."

We again turn to the testimony of Dr. Livingstone; and at this time, when there is so much uncertainty as to the safety of our great traveller, the mind naturally recurs to the state of suspense almost hopeless, save for the firm opinion expressed by Sir R. Murchison, which followed on the report of his death given by the Johanna men at Zanzibar. Great was the rejoicing at the tidings of his safety, and hearty were the congratulations offered to their president by the members of the Geographical Society at the meeting at which Dr. Livingstone's letter announcing his safety was read. While all who spoke claimed him as the great geographer, the African explorer, the undaunted traveller, there was one present who, having himself, with Livingstone, witnessed some of the horrors of the East African Slave-trade, endeavoured to impress upon the fashionable and learned assembly, that Livingstone had other objects in view beside the mere solution of geographical problems—that he was a true philanthropist, and that one of the causes nearest to his heart was the suffering oppressed slave. The appeal fell on ears geographical, geological, and polite, but unsympathising, and it was evident that the harmony of the evening was not to be marred by the mention of so uncomfortable and unscientific a subject as the woes of the slave. However interesting Africa's land and lakes and rivers may be to the man of science, the condition of Africa's sons seems to appeal only to a few unenlightened enthusiasts, whose hopes and prayers and efforts form fit subject for scoff and sneer. But the friend of the slave was the truest exponent of Livingstone's character and views; and it is deeply interesting to see the traveller, as we may picture him to ourselves, sitting down in Lat. 11° 18' South, Long. 37° 10' East, to write a long report, dated 11th June, 1866, to the Earl of Clarendon on the slave-trade. Again, writing from Lake Nyassa in the following