Be sure to stick around for the "footnotes" at the bottom of this post...
P.28, panel 4-6: This is a reference to a scene from the Carl Barks story "Lost in the Andes," in which Donald Duck, Scrooge, and the nephews encounter an ancient civilization, untouched except for having been visited once by a professor from the South--- who has taught them to speak English with a Southern accent, as far as I can recall. And yes, the character has a black dog nose--- apparently being like those dog-men that Barks used for his supporting cast (at his editors' insistence; they would not let him draw human characters.)
Oh, and the lyrics the loco sings are meaningless. I could not remember the exact lyrics, so just made that up randomly.
