The 39 Clues

I have a theory as to where one of the clues is. it's probably wrong, but what the heck.

When Abraham Lincon went down the Mississippi river, he wasn't just touring, he was looking for a clue.
Later, Napoleon sold Thedore Roosevelt the Luosiana purchase so he could have the money to look for clues in Европа and Africa. What he didn't know was that he was also selling him a clue. Roosevelt suspected that there was a clue hidden in the Mississippi,so he asked for еще land than Napoleon offered for a higher price. Napoleon agreed. The Вопрос was how was he going to look for it while still...

Then the torture began, Dan, Amy, Ian, Alistair, and her walked for what felt like FOREVER! She was sweating, actually SWEATING! Then after eternity and a день Alistair finally suggested lunch. “You wouldn’t happen to have caviar on French хлеб with sweet помидор sauce would you?” she had to ask.
    “Peanut масло, сливочное масло on wheat?” Dan replied. WORST день EVER?!?! Natalie almost screamed. But her brother stoped her by throwing something at Amy, she just noticed that he had climed the wall. How could he do that after so much walking, she didn't even have enouph energy to...