back contents forward {{frabfp144.png}} || eagles of the sky || The mysterious air voyager had by now disappeared entirely, although they might still have caught the throbbing of his madly working motor had it not been for their own engine kicking up so much racket, Jack not being inclined to make use of the capable silencer just then. Perk had made up his mind that the unknown aviator, even if other than Oscar Gleeb, was undoubtedly working the same profitable line of business as the pilot of the Curtiss-Robin ship. So, too, Perk considered it worth while to try and figure out the exact course of the high flyer as he was probably making directly for his intended goal and this knowledge was likely to prove useful to them later on. This he was able to accomplish. Working mental problems come easily to one who has played the part of a navigator aboard a modern galleon of the clouds. "Huh!" grunted Perk after figuring out his problem twice and both times reaching the same conclusion, "the guy's really striking in to mighty near the same point Jack's meanin' to make and mebee now our lines might cross if we both kept on goin' long enough." He studied this matter for some time, wondering if Jack also realized the fact and had kept silent about it for good and sufficient reasons. It afforded the ambitious Perk considerable [[144]] back contents forward