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The Crimson Knight is chosen along with Batman and Robin to guard the Liberty Train, a rolling museum displaying priceless historical documents:
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But it turns out that the Crimson Knight's crimefighting was a guise to get him an opportunity to loot the Liberty Train.
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When the dynamic duo burst in on the Crimson Knight, note that he has several of those priceless documents in his hand. And what does Robin do?
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Which causes this:
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Yes, nice going, Robin! True, it's a bit of a shame that the Declaration of Independence and a couple other priceless documents got a little wet there, but hey, at least you busted that phony Crimson Knight.
Incidentally, this story also features Batman's electronic crime file:
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The electronic crime file was the subject of a recent post over at I Believe in Bat-Mite. I talked about that same story a long time ago in my post on Batman 1956.