The car in which the two boys sat was the last of the train. It had an observation platform at the rear. In this observation compartment the motor boat boys had spent much time while the train was rolling along through the highly picturesque scenery of the Rocky Mountains. This morning, however, going swiftly past sun-lit sections of California, over a nearly level road, both young travelers were content to remain in their seats by the window.

In the car were a dozen other passengers. Only one other besides the motor boat boys was especially young. She was a girl of about eighteen, blond, rather plump and very pretty. She appeared to be traveling alone, having boarded the train at Kansas City. Tom and Joe had been able to offer her a few travelers' courtesies, which had been graciously accepted. Neither young man, however, knew the girl's name. Both motor boat boys were too well bred to attempt to force an acquaintance.

Just now, as Tom happened to lean over his seat and glance down the aisle, he saw that this young lady was in the observation compartment. She appeared to be alone there. Something in the expression on her face made her seem highly uneasy about something.

"I hope she isn't in any trouble," murmured Halstead, to himself, "and that she isn't going to find anything unpleasant at the end of her journey."

The next time he glanced down the aisle Halstead again caught a glimpse of her face.

"By Jove, I believe she's been crying, or else is about to begin," muttered the young captain. "I wonder if it's real trouble, or just something that she's afraid of."

Then Tom made haste to look away, lest the young lady should see that he had been studying her and take offense.

"Look at the roses," commented Joe, glancing out of the window at a pretty little California village through which the train was passing at somewhat lessened speed. "Great Scott, there are violets growing in the garden we've just passed. February! Think of the deep feet of snow on either bank of the Kennebec just now!"

"It's the land of roses and other posies, all right," agreed Halstead, himself looking out with a good deal of interest at the bright scene under the soft haze of the California winter day.

"Say, these are real days! This beats Florida!" exclaimed Joe, enthusiastically.