moon."

"You can read this for yourself," suggested Jack, passing over the
paper, which was one of some souvenirs brought back from what was the
longest journey on record, ever taken by human beings.

Mr. Roumann adjusted his glasses, and carefully read the article that
was printed in such strange characters. As he perused it, he nodded his
head thoughtfully from time to time. Then he passed the paper to
Professor Henderson.

The older scientist was somewhat longer in going over the article, but
when he had finished, he looked at the two boys, and said: "Jack is
right! This is an account of a trip made to the moon by some of the
Martians, who have advanced much further in the art of air navigation
than have we. Some of the words I am not altogether familiar with, but
in the main, that is what the paper states."

"And doesn't it tell about them finding a field of Reonaris?" asked
Jack eagerly, for he was anxious to prove to his chum that he was
right.

"Yes, it does," replied Mr. Henderson.

"And Reonaris is diamonds, isn't it?" asked Jack.

"It is," answered Professor Roumann gravely.

"Then," cried Jack, "what's to hinder us from going to the moon, and
getting some of those diamonds? The Martians must have left some! Let's