Question

What was the most shocking discovery made by Charley when he was going through the first day covers of his grandfather’s collection? (The Third Level)

Hint:

First day covers are normally blank, but the written message from the past validated Charley’s belief, making it a major plot twist.

Answer 1

Charley was stunned to find a first day cover dated July 18, 1894, addressed to him and written by Sam, his psychiatrist friend. This letter served as proof that Sam had reached the third level and settled in the past, thus confirming the existence of the third level.
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