Barks' commentaries:

The Horseradish Story never really had a title, though Trouble from Long Ago seems to me like a good one (see more of Barks' later suggestions HERE - Editor's remark).

The story is different from other Scrooge stories in that it is a straight-out adventure story. It makes Scrooge a victim. He is the sympathetic character who's put down and trampled on.
In many stories starring Uncle Scrooge, the old miser is depicted as short on mercy and about as mean as a bilious banker, but if you think he is mean, you should meet some of the villains he deals with. Chisel McSue, the villain of this piece, is the scion of a long line of swindlers that goes back to the days of wooden ships and iron men. He matches mettle with Uncle Scrooge in the stormy waters of the Bermuda Triangle and makes the old duck seem like a soft-hearted saint.

Instead of coming up with the climax of the story first, I came up with the middle. The very basic kernel is that I wanted to have Scrooge finding an old lost ship under the ocean, but I had to find a reason to be salvaging this ship, something more than just treasure hunting, which anyone can do.
What he had to find was the most comical thing I could come up with - this crazy horseradish. To have him look for a ring or some piece of paper sealed in a waterproof carton was a little too ordinary. It would have to be something that would repel the fishes from the ship all of those years. Believe me, that must have been some pretty potent horseradish!

In this story, there's a whole page in which I have a ship wallowing around in the waves. A hurricane is tearing the ship apart, and the villain - who is a real dirty skunk - turns on his own helper. It was a hard-boiled story!

My plots had so many angles in them that once a person read one of them he recognized it when he read it again, even if it was a little different. This story, for example, has an angle that would be hard to reuse exactly. Scrooge saves the villain, even though the scamp is totally worthless. It made Scrooge much more likable. If I had had the nephews tie Scrooge down so that they could rescue the crook, you wouldn't have had much sympathy for Scrooge, but the fact that he helped to rescue the darn guy and then got kicked in the face again made him sweet.