1. What was Sam invited for according to the letter?

2. Whose signatures were there on the letter?

3. What convinced Charly that he had reached the Third Level Grand Central Station and not the second level?

4. What did Charley find in his stamp collection?

5. What was the strangest thing at The Third Level?

6. What specific difference did Charley notice at the Third Level of Central Station?

7. What is First Day Cover?

8. Why does Charley want to visit Galesberg?

9. What did Charley see at the Third Level?

10. What did Charley see at the Third Level?