midnight
The meal disposed of , Le Blanc and the boys fixed up the folding camp cots and spread their blankets . There was still no sign of Sanborn . Frank was still struggling to keep awake in order to read the man a sharp lecture when he returned when drowsiness overcame him and he dropped off to sleep . It was an hour later , and not far from midnight , when two dark figures crossed the deserted aviation field and threaded their way among the various aerodromes . They paused in front of the one in which the boys were asleep . Had the lads been onlookers they would have seen that one of the men was Sanborn , the new machinist , and the other was Malvoise , the driver of the sable Buzzard . `` You wo n't lose your nerve ? ''