In his letter to Charley, Sam …

One can notice that Sam's letter to Charley is engulfed with series of mysteries. When Charley was fussing with his stamp-collection in the night, he comes across an envelope among his oldest first day covers. In a way it should not have been there, but it was there. He had not seen that envelope before. It was there because someone had mailed it to his grandfather at his home in Galesburg, Illinois and it had been there since July 18, 1894. The post-mark revealed that the stamp was a six-cent with a picture at President Garfield.

Generally, the first day cover has only a blank paper in the envelope but there the paper was written and signed by Sam. It was only addressed to Charley. Sam had written that he had found the Third Level. It means that Charley was correct about the Third Level. Further he had been putting up at Galesburg, Illinois for two weeks where people had been enjoying a romantic life. He asked Charley and Louisa to go there. They should keep looking till they found the Third Level.

It is rather much astonishing how such a letter was never noticed earlier. It is all the more surprising how Sam disappeared and nobody knew his where abouts. But Charley had doubts about his (Sams) presence in Galesburg. It is also mysterious that the letter is written by Sam and is addressed to Charley on July 18, 1894. It is also strange to note that Sam is not else except Charley's psychiatrist.