This story uses panels from Barks' "The Money Well" (W US 21) (see Fort Duckburg's page), "The Big Bin on Killmotor Hill" (WDC 135), and "The Old Castle's Secret" (OS 189).
First, that panel is from "The Big Bin on Killmotor Hill" :
Than, that one is from "The Old Castle's Secret" :
Panels from "His Majesty, McDuck" are used in again "The Billionaire
Of Dismal Downs" (D
93121).
Panels from "The Money Well" are used in "The Guardians of
the Lost Library" (D
92380), "The Invader of Fort Duckburg" (D
93227) (Fort
Duckburg),"The Richest Duck in the
World" (D
93488), and "W.H.A.D.A.L.O.T.T.A.J.A.R.G.O.N." (D
97052) (Fort
Duckburg).
Panels from "The Big Bin on Killmotor Hill" are used in"The
Guardians Of The Lost Library" (D
92380), and "Cash Flow" (AR
106).
Panels from "The Old Castle's Secret"
are used in "The Last of the Clan McDuck" (D
91308), "The New Laird Of Castle McDuck" (D
92191), and "The Billionaire of Dismal Downs" (D
93121).