Although Papa Wolf was obdurate about the adventure, his big heart could not permit him to allow him to let Austin spend Christmas day in a hotel. When he learned that Austin had a wife and child in Washington, nothing would do but that the Smithsonian man should share in a home Christmas. Papa Wolf provided another guest also, a stranger named Adolph Werner. He was a German banker, traveling across America on business, and the Wolf family was instructed to treat him with great deference. Stout and bespectacled, he proved a delightful guest and Dr. Austin displayed a gift for comic songs that brought the house down. The two guests discovered that they both had studied for several years in Munich and a great meeting of spirits followed, materially assisted by Papa Wolf, Uncle Hugo and a bowl of Glueh Wein. And when it was still further discovered that Werner's next stopping place was St. Louis, he was invited at once to join the Sun Planters, as Elsa had dubbed them. He accepted at once and on New Year's Day, with Elsa and her mother weeping and Papa Wolf blinking back tears but sternly refusing to say good-by, the party pulled out of the little Eagle's Wing station. Herr Werner proved to be a delightful traveling companion and he became so much interested in the details of the experiment that he insisted that he be invited to visit the plant; an invitation that was given most cordially by Roger. Thanks to Dr. Austin's experienced presence, the purchases in St. Louis were made in record time and at the end of the second week in January, Roger and Ernest set forth alone for the desert country. It was their first trip west of the Mississippi and both men were absorbed in watching the changes of scenery as the train whirled from one state to the next. Albuquerque was an hour behind when Ernest came into the smoking compartment where Roger was engaged in drawing on the back of an old envelope. "Say, Rog, I know you aren't interested in the sex, but there's the most unusual little girl on the train. She's seven years old and traveling all alone. Her name is Felicia. She got in at Kansas City. They checked her through like a pup. She's going out to join her brother and sister on a mining claim near Archer's Springs." Roger did not stop his pencil. "Seems as if we'd have neighbors," he said. "I hope this is a sample of Archer's Springs girls!" said Ernest. "Honestly, Roger, she's a lovely kid. Come on back and see her. I'm going to take her out on the observation platform with me." Roger grunted, and Ernest, with a grin, left him in peace. It was an hour later when Roger, having forgotten about the child, but wanting to ask Ernest a question, made his way to the observation platform. It was so exceedingly dusty that Ernest and his little friend had it to themselves. "Here she is, little Felicia!" cried Ernest. "And here he is, big Roger!"