came. "It will soon be dark."

"Darkness will make no difference to us," announced Professor Roumann.
"Our Cardite motor will soon take us out of the shadow of the earth,
and we will be in perpetual sunshine until we reach the moon. As we are
all ready, we might as well start now."

They all agreed with this, and, after a final inspection of the
projectile, the travellers entered it, and Jack was once more about to
seal the big door.

Before he could do so there came riding into the yard, on his
motorcycle, which he had claimed that afternoon, Dick Johnson.

"Wait a minute," he cried. "I've got a letter for you. It's from that
man!"

"What--another thing to delay us?" cried Jack, but he called to
Professor Roumann not to start the motor, and ran to take from Dick the
letter which the lad held out.

"That same man who gave me the one for Mark gave me this, and he paid
me a half a dollar to bring it here," said the boy.

"All right," answered Jack impatiently.

He looked at the note. It was addressed to the "Moon Travellers," and,
considering that he was one, the youth tore open the envelope. In the
dim light of the fading day he read the bold handwriting.