place, Harriet was an entirely different type of girl. She had been mistress of her father's house in Washington since she was sixteen. She had received her father's guests and entertained his friends; and at eighteen she had made her début into Washington society, and had taken her position as one of the women of the Cabinet. Harriet's mother, Ruth's aunt, had died a few months before Mr. Hamlin had received his appointment as Assistant Secretary of State. Since that time Harriet had borne the responsibilities of a grown woman, and being an only child she had to a certain extent done as she pleased, although she was secretly afraid of her cold, dignified father.

Mr. William Hamlin was one of the ablest men in Washington. He was a quiet, stern, reserved man, and although he was proud of his daughter, of her beauty and accomplishments, he was also very strict with her. He was a poor man, and it was hard work for Harriet to keep up the appearance necessary to her father's position on his salary as Assistant Secretary of State. Harriet, however, never dared tell her father of this, and Mr. Hamlin never offered Harriet either sympathy or advice.

Barbara and Ruth could only watch with admiring eyes and little exclamations of delight the exquisite garments that Harriet now lifted out of three big, pasteboard boxes; a beautiful yellow crêpe frock, a pale green satin evening gown and a gray broadcloth tailor-made suit. Harriet was tall and dark, with very black hair and large dark eyes. She was considered one of the beauties of the "younger set" in Washington society. Ruth had not seen her cousin for several years, until she received the invitation to bring the "Automobile Girls" to Washington.

Ruth Stuart and Barbara Thurston had changed very little since their last outing together at Palm Beach. Barbara was now nearly eighteen. At the close of the school year she was to be graduated from the Kingsbridge High School. And she hoped to be able to enter Vassar College the following fall. Yet the fact that she was in Washington early in December requires an explanation.

Two weeks before Bab had walked slowly home to Laurel Cottage at about three o'clock one November afternoon with a great pile of books under her arm.

On the front porch of their little cottage she found her mother and
Mollie, greatly excited. A telegram had just come from Ruth Stuart. The
"Automobile Girls" were invited to visit Ruth's cousin in Washington,
D.C. Ruth wished them to start at the end of the week.

Bab's face flushed with pleasure at the news. She had not been with her beloved Ruth since the Easter before. Then the color died out of her face and her cheeks showed an unaccustomed pallor.

"I am so sorry, Mother," Bab responded. "I would give anything in the world to see Ruth. But I simply can't stop school just now, or I shall lose the scholarship. Mollie, you can accept Ruth's invitation. You and Grace Carter can go to Washington together. You won't mind going without me."

"I shall not stir a single step without you," blue-eyed Mollie returned firmly. "And Mother thinks you can go!"

Mollie and Mrs. Thurston, aided by Bab's teachers, at last persuaded Barbara to take a few weeks' holiday. Bab could study to make up for lost time during the Christmas holidays. For no one, except the young woman herself, doubted Barbara's ability to win the desired Vassar scholarship.

And so it was arranged that Bab and Mollie should go with Ruth to Washington. Bab had grown taller and more slender in the past few months. Her brown braids are now always coiled about her graceful head. Her hair was parted in the middle, although a few little curls still escaped in the old, careless fashion.

Ruth Stuart, too, was looking sweeter and fresher than ever, and was the same ingenuous, unspoiled girl, whose sunny disposition no amount of wealth and fashion could change.

Readers of the first volume in the "Automobile Girls Series," entitled "The Automobile Girls At Newport," will recall how, nearly two years ago, Ruth Stuart, with her father and her aunt, Miss Sallie Stuart, came from their home in far away Chicago to spend the summer in Kingsbridge, New Jersey. The day that Barbara Thurston stopped a pair of runaway horses and saved Ruth Stuart from death she did not dream that she had turned the first page in the history of the "Automobile Girls." A warm friendship sprang up between Ruth and Bab, and a little later Ruth Stuart invited Barbara, her younger sister, Mollie Thurston, and their friend, Grace Carter, to take a trip to Newport in her own, red automobile with Ruth herself as chauffeur and her aunt, Miss Sallie Stuart, as chaperon.

Exciting days at Newport followed, and the four girls brought to bay the "Boy Raffles," the cracksman, who had puzzled the fashionable world! There were many thrilling adventures connected with the discovery of this "society thief," and the "Automobile Girls" proved themselves capable of meeting whatever emergencies sprang up in their path.

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