“What’s all this praise you’ve been giving Mr. Lewis and me for our scientific work?” he asked, trying hard to suppress a smile.

The young men grinned. They had not suspected this.

“You got it right,” returned Joe. “You two have done as much for the museum as anyone else in this old U. S. And that’s as straight as a lion’s tail when he’s about to charge.”

Mr. Holton laughed unbelievingly.

“I know your game,” he chuckled. “You’re paving the way to accompany us on that Brazilian trip we’re about to take. Right?”

Bob and Joe jumped to their feet in wild excitement. A trip to Brazil! Think of that! Then their supposition was correct. Something was stirring after all.

Mr. Holton guessed their thoughts and broke the short period of suspense.

“It’s an expedition to the jungles of the Amazon,” he explained, as the boys seated themselves and listened with breathless interest. “Going to get specimens of fauna for the museum. In addition, we wish to make a study of several wild Indian tribes there. It’s a trip I’ve always wished to take, but, strange to say, I’ve never had the opportunity. You boys probably know that this region is one of the least-known on the face of the globe. It has the world’s heaviest forests, some of the most savage of people, and a wide variety of birds and beasts.”

“Great!” blurted out Joe in a strange, animated tone. “How wonderful it would be! Away out in the wildest of Brazilian wilds, seeing strange and astonishing things—things that only a very few have the opportunity of seeing.”