stupendous jewel, brought rest. They camped in the wady, with
machine-guns mounted and sentinels out. Abd el Rahman, liberated from
his bonds and under strict surveillance, still refused to talk. No
information could be got from him; but Rrisa's eyes brightened with
unholy joy at sight of the old man ceremonially tearing his burnous
and sifting sand on his gray head.

"Allah smite thy face, _ya kalb!_" (O dog!) he murmured. "Robber of
the Haram, from Jehannum is thy body!"[1]

[Footnote 1: Alluding to the Arab superstition that every man's body
is drawn from the place where it will eventually be buried. Rrisa's
remark, therefore, was an Oriental way of wishing the Sheik back into
Hell.]

Night passed with no alarm, quietly save for the yelping and
quarreling of the jackals and hyenas at work beyond the dunes. Early
morning found the Legionaries again at work; and so for five days they
toiled. The Legion was composed of picked men, skilled in science and
deep in technical wisdom. With what tools still remained from the time
when all surplus weight had been jettisoned, and with some improvised
apparatus, they set vigorously to work repairing the engines, fitting
new rudder-plates, patching up the floats and providing the burned
propellers with metal blades.

Metal enough they had at hand, by cutting out dispensable partitions
from the interior. And beavers never worked as these men worked in
spite of the fierce smitings of the tropic sun. Even the wounded men
helped, holding or passing tools. The Master labored with the rest,
grimy, sweating, hard-jawed; and "Captain Alden" did her bit without
a moment's slackening. Save for Abd el Rahman, now securely locked
without any means of self-destruction in a stateroom, no man idled.

Anxiety dogged their every moment. Sudden storm might yet hopelessly
break up the stranded air-liner. Other tribes might have seen the
signal-fire and might descend upon the Legionaries. Arab slavers might
discover them, beating along the coast in well-armed dhows. Twice, in
five days, latteen-sailed craft passed south, and one of these put
in to investigate; but a tray of blanks from a machine-gun, at half a
mile, turned the invader's blunt nose seaward again.

The greatest peril of all was that some news of the wreck might reach
Rio de Oro and be wirelessed to civilization. That would inevitably
mean ruin. Either it would bring an air-squadron swooping down, or
battle-ships would arrive.