AFRICAN EXPLORERS OF TEE EIGHTEENTH CENTURY. 73 
no longer possible to confound the three rivers, as the 
French geographer Delisle had done, in 1707, when he re¬ 
presented the Niger as running eastward from Bornu, and 
THE CARAVAN ON THE MARCH. 
flowing into the river Senegal on the west. He himself, 
however, had admitted and corrected this error, in his 
later maps of 1722 and 1727, no doubt on account of 
