GHAT MOUNTAINS HEAT. 
147 
cultivated fields near the desert, or in the fertile 
lands of the coast, as in the neighbourhood of Mo- 
gador, where millions of the young have been seen 
like so many small green buds of trees. 
Dr. Overvreg made an excursion to the Ghat 
mountains, or rather the smaller hills or offshoots 
from the range. He found them sandstone, but very 
singularly formed or broken into huge blocks — 
some like the masses which I saw on the route 
from Ghadamez to Ghat, with a very narrow base, 
on which they might turn as on a pivot. 
II th. — We stopped here another day. We were 
to have started in the afternoon_, but the Tuaricks 
had some visitors come to see them, and detained us 
for their own comfort and amusement. I am not 
sorry for it, as we have had a tremendous gheblee. 
All the day I felt it extremely hot, and so have all 
the people. I was obliged to lie down on the floor 
of my tent nearly all day ; but I have so arranged 
my table that I put my head under it, which gives 
additional and most important protection from the 
sun. All these little expedients must be resorted to 
in travelling over the desert, and may sometimes 
save a man's life. It is surprising what protection a 
piece of cloth or linen, or a piece of board, in addi- 
tion to the tent, will give against the intensity of the 
sun's fierce rays. The Moors and blacks of the 
coast seem to suffer as much as the Europeans. 
There are two ways from this wady to Ghat — a 
difficult, and an easy but longer one. I and the 
