t,--their minds being given to
making their way over the ridge without being seen by the occupants of
the encampment.

Having returned their dirks to the sheath, they continued to advance
towards the crest of the transverse sand-spar, as cautiously as at
starting.

It is possible they might have succeeded in crossing, without being
perceived, but for a circumstance of which they had taken too little
heed. Only too well pleased at seeing the strange quadruped make its
retreat, they had been less affected by its parting salutation,--weird
and wild as this had sounded in their ears. But they had not thought of
the effects which the same salute had produced upon the people of the
Arab camp, causing all of them, as it did, to turn their eyes in the
direction whence it was heard. To them there was no mystery in that
screaming cachinnation. Unearthly as it had echoed in the ears of the
three mids, it fell with a perfectly natural tone on those of the Arabs:
for it was but one of the well-known voices of their desert home,
recognized by them as the cry of the _laughing hyena_.

The effect produced upon the encampment was twofold. The children
straying outside the tents,--like young chicks frightened by the
swooping of a hawk,--ran inward; while their mothers, after the manner
of so many old hens, rushed forth to take them under their protection.
The proximity of a hungry hyena,--more especially one of the _laughing_
species,--was a circumstance to cause alarm. All the fierce creature
required was a chance to close his strong, vice-like jaws upon the limbs
of one of those juvenile Ishmaelites, and that would be the last his
mother should ever see of him.

Knowing this, the screech of the hyena had produced a momentary
commotion among the women and children of the encampment. Neither had
the men listened to it unmoved. In hopes of procuring its skin for house
or tent furniture, and its flesh for food,--for these hungry wanderers
will eat anything,--several had seized hold of their long guns, and
rushed forth from among the tents.

The sound had guided them as to the direction in which they should go;
and as they ran forward, they saw, not a hyena, but three human beings
just mounting upon the summit of the sand-ridge, under the full light of
the moon. So conspicuously did the latter appear upon the smooth crest
of the wreath, that there was no longer any chance of concealment. Their
dark blue dresses, the yellow buttons on