The Ghost of the Grotto

The Ghost of the Grotto is a Donald Duck comic strip story written by Carl Barks.

Plot
Donald Duck and his nephews go sailing on a boat and Dewey gets kidnapped by a man in armour. Donald, Huey and Louie have to rescue him with the help of a squirt gun and a mouse named Montmorency Rodent. This is one of a few times where the nephews get separated. The mysterious man is revealed to be the latest guardian of the treasure of Sir Francis Drake.