12th.--At 9 A.M. we were again in motion on our westward course,
rising by a gentle incline to about half-way between Rhut Tug and a
second Wadi Nogal farther on, called Yubbe Tug. Here, at the
water-parting between these two large watercourses, was the tomb of
the great founder of these mighty nations, Darud bin Ismail, and an
excavated tumulus. There were also several bitter springs in the
neighbourhood, with stone enclosures and numerous flocks of sheep
tended by Somali. On passing the tomb I scarcely remarked it, so
insignificant did it appear, whilst the Somali paid no homage to it
whatever. But the tumulus excited more attention, and I was requested
to examine it. Six years ago, the interpreter said, a Somali who
wished to bury his wife in it, broke through its exterior, and found a
hollow compartment propped up by beams of timber, at the bottom of
which, buried in the ground, were several earthenware pots, some
leaden coins, a ring of gold such as the Indian Mussulman women wear
in their noses, and various other miscellaneous property.

I was very much struck with the sleekness of the sheep, considering
there appeared nothing for them to live upon; but I was shown amongst
the stony ground here and there a little green pulpy-looking weed, an
ice plant called Buskale, succulent, and by repute highly nutritious.
It was on this they fed and throve. These Dumba sheep--the fat-tailed
breed--appear to thrive on much less food, and can abstain longer from
eating, than any others. This is probably occasioned by the
nourishment they derive from the fat of their tails, which acts as a
reservoir, regularly supplying, as it necessarily would do, any sudden
or excessive drainage from any other part of their systems.

After crossing over this high land we began descending to the