Question

How did " the help charley to confirm his doubts regarding the existence of a third level

Answer 1

Answer:

In the beginning, when Charley reached the third level, he was confused. Whatever he saw in third level told him that he had travelled back to the past. This was confirmed when he saw - The World, a newspaper of the past that was no more published. The lead story said something about President Cleveland and it was printed in June 11, 1894.