what is ill famed Hawk? 55

[Joseph T]

Any thoughts as to what is "the ill-famed Hawk" of the first line of  
the bottom section. Why is it capitalized? is it the hawk of the  
Barbaric Yawp in W. Whitman.

Is there some evil balloon  I can't remember called the Hawk?. Is it   
an accidental capitalization? kinda weird.

Adventure is a state of mind which  the world's fair corrupts. which  
the end of the frontier announces. This transition is further  
announced as" internal sources of power",.." not the ballooning  
profession as the boys had learned it."
Spoilerish below.

There is an odd contradiction in this loss for the chums  and the  
following chapters on time travel, the Michaelson Morley experiment,  
the alchemical pursuits of Merle and Roswell, the explorations at  
Gottingen and the grand hopes of Tesla. These all offer frontiers of  
a different kind  which may deny the aether but point to large  
regions of possibility. I see Pynchon  and his characters Bounce- ing  
and Skip-ping between the opening and closing of possibilities.  I've  
noticed this quantum leaping in real life also.