Duckburg, Calisota and Shamrock Bones

[Larry Giver]

    Rich Bellacera asked if "The Gilded Man" is the first mention of
Duckburg.  No, it was mentioned many times before, but it
was the first (and AFAIK Barks' only) mention of Calisota.  On
page 26, panel 1 Barks needed a state name to complete the
forwarding address of the letter with the magenta stamp.
    As for Shamrock Bones, he's in the MM story, "The Shattered-
glass Mystery", printed in 4 parts, Feb. - May, 1952, WDC 137-140.
He does not appear until Part 3 (WDC 139) page 1, panel 2.