This cache is not at the posted coordinates. Do not go there, there is nothing for you to see there.
To figure out where the final coordinates are, enter the answer to question 1 in the first checker. Then answer the question provided at that point in the second checker.
1. Who wrote, "The Prince and the Pauper"?
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2. Get question 2 by answering question 1 above!
You can validate your puzzle solution with certitude.