take you home to-night in the sky racer. I want to talk more about
the city of gold, and plan what we ought to take with us to Mexico."

"All right," agreed Mr. Damon. "I'll stay, but I suppose I
shouldn't. But let's mail the letter."

It was after supper, when, the letter having been posted, that Tom,
his father and Mr. Damon were discussing the city of gold.

"Will you go, even if Mr. Illingway can't send a better map?" asked
Mr. Damon.

"Sure" exclaimed Tom. "I want to get one of the golden images if I
have to hunt all over the Aztec country for it."

"Who's talking of golden images?" demanded a new voice, and Tom
looked up quickly, to see Ned Newton, his chum, entering the room.
Ned had come in unannounced, as he frequently did.

"Hello, old stock!" cried Tom affectionately. "Sir, there's great
news. It's you and me for the city of gold now!"

"Get out! What are you talking about?"

Then Tom had to go into details, and explain to Ned all about the
great quantity of gold that might be found in the underground city.

"You'll come along, won't you, Ned?" finished the young inventor.
"We can't get along without you. Mr. Damon is going, and Eradicate
too, I guess. We'll have a great time."