In “The Automobile Girls in the Berkshires,” the second volume of the “Automobile Girls Series,” the scene is laid in a little log cabin on top of one of the highest peaks in the Berkshire hills, where the four girls and Miss Sallie spent a happy period of time “roughing it.”  There it was that they discovered an Indian Princess and laid the “Ghost of Lost Man’s Trail.”

In the third volume of the series, “The Automobile Girls Along the Hudson,” the quartet of youthful travelers, accompanied by Miss Sallie Stuart, motored through the beautiful Sleepy Hollow country, spending several weeks at the home of Major Ted Eyck, an old friend of the Stuarts.  There many diverting experiences fell to their lot, and before leaving the hospitable major’s home they were instrumental in saving it from destruction by forest fires.

The fourth volume of the series, “The Automobile Girls at Chicago,” relates the adventures of the four friends during the Christmas holidays, which Mollie, Grace and Bab spent with Ruth at Chicago and at “Treasureholme,” the country estate of the Presbys, who were cousins of the Stuart family.  While there, principally through the cleverness of Barbara Thurston, the hiding place of a rich treasure buried by one of The ancestors of the Presbys was discovered in time to prevent the financial ruin of both Richard Presby and Robert Stuart, who had become deeply involved through speculation in wheat.

Before Mollie, Grace and Barbara returned to Kingsbridge, Mr. Stuart had promised that they should see Ruth again in March at Palm Beach, where he had planned a happy reunion for the “Automobile Girls.”  There it was that they had, through a series of happenings, formed the acquaintance of a mysterious countess and become involved in the net of circumstances that was woven about her.  How they continued to be her friend in spite of dark rumors afloat to the effect that she was an impostor and how she afterwards turned out to be a princess, is fully set forth in “The Automobile Girls at Palm Beach.”

“Really, Bab,” said Ruth, as the two girls went upstairs to their rooms to dress for dinner, “I have not had a chance to talk to you, alone, since we arrived in Washington.  How is your mother?”

“As well as can be,” Bab answered.  “How is darling Aunt Sallie?  I am so sorry she did not come to Washington with you to chaperon us.  There is no telling what mischief we may get into without her.”

Ruth laughed.  “I have special instructions for the ‘Automobile Girls’ from Aunt Sallie.  We are to be particularly careful to mind our ‘P’s’ and ‘Q’s’ on this visit, for Aunt Sallie wishes us to make a good impression in Washington.”

Barbara sighed.  “I’ll try, Ruth,” she declared, “but you know what remarkable talent I have for getting into mischief.”

“Then you are to be specially par-tic-u-lar, Mistress Bab!” Ruth said teasingly.  “For Aunt Sallie’s last words to me were:  ’Tell Barbara she is to look before she leaps.’”