THE WORLD'S WONDERS. 331 



constant strain on his untutored mind seemed now to reach a 

 climax, for during the night he became insane. He had descended 

 into a boat, and when Livingstone attempted to go down and 

 bring him into the ship, he ran to the stern and said, " No ! no ! 

 it is enough that I die alone. You must not perish ; if you 

 come I shall throw myself into the water." The officers pro- 

 posed to secure him by putting him in irons ; but, being a gen- 

 tleman in his own country, Livingstone objected, knowing that 

 the insane often retain an impression of ill treatment, and he 

 could not bear to have it said in Sekwebu's country that he had 

 chained one of the principal men as they had seen slaves treated. 

 In the evening a fresh accession of insanity occurred ; he tried 

 to spear one of the crew, then leaped overboard, and, though he 

 could swim well, pulled himself down hand under hand by the 

 chain cable. They never found the body of poor Sekwebu. 



LIVINGSTONE'S 

 SECOND EXPEDITION. 



CHAPTER XVHI. 



NOBLE PURPOSES OF A GREAT MAN. 



THE sixteen years which Livingstone had spent in Africa served 

 to largely increase the spirit of adventure which first led him to 

 renounce the influences of civilization for the barbarous regions 

 of an unknown country. He was restless in England, and longed 

 to return and continue the labors he had begun in Africa. K* 



