If you think I'm going through too many stories (and there are more to come), I assure you that I am trying to keep it to a minimum. I would have liked to explain what the story A Race to the South Sea! actually is. Essentially, Scrooge's plane crashes in the middle of the Pacific, and both Donald and Gladstone race out there to be the one to find a rescue Scrooge, hoping that it will make them Scrooge's favourite nephew, and so make them become the heir to Scrooge's vast fortune.
Now, because of his luck, Gladstone, wins of course, arriving first, only to discover that Scrooge is having a nice time with the natives on this remote island and that he deliberately crashed his plane just so that he could have a nice vacation. He is now terribly annoyed that Gladstone showed up to disturb him, and that while he was going to split his fortune between Gladstone and Donald equally, because Gladstone (whom Scrooge reminds him is not actually related to him by blood) has gone and ruined his vacation, he intends to blot out Gladstone's name from the will so Donald will inherit everything.
(Of course, in a later Barks story, Donald also gets expunged from the will, with Huey, Dewey, and Louie being named Scrooge's principal heirs.)
What I love about the story is that it essentially features the richest man in the world faking his death just so he can have two weeks' vacation.