Dagobert sucht nach einem Mittel, um die Ratten aus seinem Geldspeicher ...
This story probably was intended as an 8-page Gyro story for the FC series; however, Barks abandoned the project after he had made pencil sketches of the first 3 pages.
In the 1980's, Don Rosa inked Barks' sketches and expanded them to 8 pages (CBL VI/2/379). First publication worldwide in Dutch Donald Duck 15/90 under the code H89174.