Question about a Barks's story: W US 19-04 Gyros Builds a Better House

[dario]

Hi to everybody,  
Excuse me, but my english is not very good.  
I have a question about the story W US 19-04 "Gyros Builds a Better House".  
Carl Barks has drawn some sheets of paper, on the ground. 
There are 3 of them (page 2: second and third panels, page 3: sixth panel).  
These sheets of paper are postal letters, with the sender's name in show.
They don't have any bond with the plot of the history.  
I have read the Italian version published on ZIO PAPERONE 7:
the names of the senders are: ALICE CALLOUS CORVALUS
(or perhaps CALLOLIS CORVALLIS), FLORE FLOUNCY Of KOKOMO,
CLAMMY SAMMY Of ALABAMMY).  
Are these letters also present in the original version of the story? 
If yes, what is the meaning of these letters?  
Perhaps a homage to some fanses?

Thanks for the attention!  
Best regards to everybody!!!