Franklin W. Dixon is the pseudonym for Edward Stratemeyer, the author of the Hardy Boys mysteries. Case Closed.
 

"Meanwhile, Biff had untied Chet.  The heavyset teen had slumped to the ground in a dead faint.

'Out cold,' Frank said.  He opened his canteen and sprinkled some water on Chet's forehead.  Chet opened his eyes and blinked, 'I'm alive!' he exclaimed.  'Thanks, guys.'  He stumbled to his feet and took a deep breath.

'How'd you get into a mess like this?' Biff asked.

Chet stomped up and down to get circulation flowing in his legs.

'I saw a pair of suspicious individuals with hats pulled low over their heads slinking along through the wilderness,' he began dramatically.

Joe rolled his eyes.  'Oh, boy.  Here we go, guys.'"

– The Money Hunt, in Hardy Boys Digest #101