Donald Duck #31/1967

In "null," Scrooge Duck unveils his new vault, accessible only by playing "My Bonnie Lies Over the Ocean" on a fife—until the instrument vanishes during a daring heist at the Cathedral of Notre Duck. With the fife stolen and a mysterious black-clad thief playing the tune elsewhere in the cathedral, Donald, Kwik, Kwek, Kwak, and Scrooge must chase the culprit through echoing stone halls, only to find themselves cornered and trapped.