Again the stout little airship began to circle the “hide out” territory. With his field glasses Art could make out white flags in all directions. Carrying out a prearranged plan, Bonner headed the aeroplane from one sentinel-like Wolf to the next one. As the first one was passed he reversed his staff and held its head on the ground. A look of disappointment passed over the face of each boy in the aeroplane and Art made a check on the chart in his lap. It was Sammy Addington’s report—a blank.
The next Wolf the aeroplane picked up held his staff out like a semaphore and then moved it up and down four times.
[Signaling the “Aeroplane Spy”]
“That’s better!” exclaimed Art. “I wonder who number four is.”
Flitting over the fields, forests and roads beneath, the “Scouts of the Air” were soon signalled by Colly Craighead who confirmed his discovery of the Coyote in the hill furrow by eight movements of his flag. Then, in turn, came a Wolf who they saw was Davy Cooke, who announced he had seen number two; Paul Corbett reported number four sighted and then while Art was busy checking this information, Bonner caught an extra message of one flash.
“I wonder if he means he saw number five, or number four and number one!” exclaimed Art, in doubt what to put down. “We already have number four.”
The next searcher to communicate with the aeroplane answered this; Phil Abercrombie flashed five times.
“Great!” shouted the aviator. “Only one blank so far. There’s Connie,” he added. “Bully for you, old man! He’s got number ten. That ought to be lucky.”