said Tom, as he talked it over with Ned and Mr. Damon in the privacy of their tent, which had been set up.
"But why should there be giants there any more than anywhere else?" asked Ned.
"No particular reason," answered his chum. "But, according to the last word Mr. Preston had from his agent, that was where he was heading for, and that's where Zacatas, his native helper, said he lost track of his master. I have a theory that the giants, if we find any, will turn out to be a branch of a Patagonian tribe."
"Patagonians!" exclaimed Ned.
"Yes. You know the natives of the Southern part of Argentina grow to a considerable size. Now Patagonia is a comparatively bleak and cold country. What would prevent some of that big tribe centuries ago, from having migrated to a warmer country, where life was more favorable? After several generations they may have grown to be giants."
"Bravo!" exclaimed Mr. Damon. "It's a good theory, at any rate, Tom. Though whether you can ever prove it is a question."
"Yes, and a big one," agreed the young inventor with a laugh.
For some days they traveled along over a comparatively flat country, bordering the river.
