“It’s iron in your blood that makes your cheeks red; iron in red apples; iron——”

“Pardon me, doctor,” interrupted Mr. Prescott, “the tire is on.”

“By the way, Bradford, I believe you’ve been told to take your time about returning?”

“So I understand,” answered John Bradford, smiling as he spoke.

“Then, if you don’t mind, Bradford, we’ll motor on to a place where these young fellows,” he said, waving his hand toward the doctor and Billy, “may be able to learn a thing or two more on the subject of iron.”

CHAPTER XIV
THE GIANTS

They stood on the dock of a river where great ships leave their burden of iron ore.

“There she comes!” exclaimed Mr. Prescott, pointing to a freighter that was slowly drawing near.