"I hope you're not going to go as a missionary to Africa, Tom," said the postman.
"No danger. This is just a letter from a friend there. He sent me some facts so I can go off on another expedition."
"Oh, you're always going off on wild adventures," commented Uncle Sam's messenger with a shake of his head as he hurried away, while Tom tore open the letter from Africa and eagerly read it.
Chapter VI "Beware The Head-Hunters!"
"That's what I want!" exclaimed the young inventor, as he finished the perusal of the missionary's missive.
"What is it?" asked Mr. Swift, entering the shop at that moment.
"News from Africa, dad. Mr. Illingway went to a lot of trouble to get more information for us about the city of gold, and he sends a better map. It seems there was one among the effects of the white man who died near where Mr. Illingway has his mission. With this map, and what additional information I have, we ought to locate the underground city. Look, dad," and the lad showed the map.
"Humph!" exclaimed Mr. Swift with a smile. "I don't call that a very clear map. It shows a part of Central Mexico, that's true, but it's on such a small scale I don't see how you're going to tell anything by it."
"But I have a description," explained Tom. "It seems according to Mr. Illingway's letter, that you have to go to the coast and strike into the interior until you are near the old city of Poltec. That used to be it's name, but Mr. Illingway says it may be abandoned now, or the name changed. But I guess we can find it."