442 EXTKAORDINAKY NATURAL TUNNEL. 
other as they rode along briskly on their camels. We 
had with us a poor half-witted fellow, or fool, named 
Mahoka, whom Bombay had obtained for a few yards 
of cloth, and kept as his servant. He was a hard- 
working fellow, but would often burst out into fearful 
rages, refusing to work. There was something of the 
rogue about his fooleries, and he held his own amongst 
the men. One night he fell asleep upon the top of his 
camel, and dropt down upon his back on the ground, 
his legs, arms, and spear flying in the air. I thought 
the creature was killed, but he got up, laughed, 
snapped his fingers, and danced a war-dance. He 
would not, however, remount his camel for an hour or 
two. While marching through the picturesque valley 
of Dullah, a circumstance elicited from Manua in his 
account of his wanderings, may be mentioned here as 
noted at the time. I repeated it to Dr Livingstone, 
who also had received some information regarding it. 
Extract, 10 th May 1863 : "While riding along on our 
camels last night, Manua told me of a tunnel, the 
work of God, which runs north and south between 
Loowemba and Ooroongoo (two months' march from 
Kazeh), which took the caravan of Arab Khamees, 
with whom he was travelling, from sunrise till noon 
to march through, and which was as broad as from 
that white stone to the back hill (a distance which I 
judged to be four hundred yards). Over this tunnel 
an unfordable river with rocky sides (here he pointed 
to the hills around us) runs at right angles to the 
Tanganyika Lake. If boats were to attempt to ferry 
this river, the cliffs are too steep to permit of their 
landing, — the river is forded by passing through the 
natural tunnel underneath. As to its height, this 
