eight o'clock
`` Well does n't that beat all , '' he exclaimed . As night fell and the air grew heavier , the barometer showed that the Cibola had a tendency to rise . The aeroplanes were readjusted and then for an hour the craft sped on untouched . At eight o'clock Ned said : `` We have n't traveled over eighteen miles in an hour and we 've been afloat four hours . If we are still over the Chusco and Elmer and Buck are at the appointed place we may be within ten or twelve miles of them . '' `` They are going to burn three small camp fires set in a triangle , you remember , '' remarked Bob . `` Therefore , '' suggested .