“I am fascinated, enchanted!” she exclaimed. “Mr. Stuart, I thank you for the pleasure of this afternoon.”

There was always a slight formality in the young countess’s manner which kept people at a distance.

“Do not thank me, Countess,” protested Mr. Stuart. “You and Madame de Villiers are conferring an honor upon us.”

“Madame de Villiers and I are two lonely women,” continued the countess. “We have not seen the beauties of this place, except from our piazza. How exquisite this grove is! Truly, it is like paradise.”

Again the young woman’s gaze swept the tea garden. Suddenly her face turned white. She bit her lips, and sat as if turned to stone. Her eyes were fastened on a group of three men at a nearby table. Madame de Villiers had not noticed them. The men had not yet noticed the Stuart’s guests.

The countess dropped her veil quickly. Ruth and Mollie, sitting on each side of the countess, were the only members of the party who felt that something had happened, and they were wise enough to be absolutely silent. Only the girls’ eyes followed the direction of the countess’s. They, too, saw the three men, one of whom they recognized as Mr. Duval. The other two were strangers, foreign-looking men with waxed mustaches and light hair.

All at once Mollie felt her hand seized convulsively under cover of the table. But the little girl was not prepared for the special mark of confidence that the countess was now to bestow on her. As Mollie held the countess’s hand in her own, she felt a tap, tap in the centre of her palm. Like a flash Mollie remembered. The countess had given her the danger signal they had agreed upon the day before. Mollie looked quickly over at Maud Warren. She presumed the signal indicated that there was something the matter with Maud. But Maud was sitting quietly between Barbara and Grace Carter.

Then what could the countess mean? Could she be jesting? Mollie did not think so. Through the meshes of her white veil the face of the countess looked out very white and grave.

Mollie’s heart was beating fast. What could she say? What must she do? Of one thing she now felt sure. The beautiful Countess Sophia von Stolberg was threatened with trouble. She should have all the aid that the “Automobile Girls” could give.

“I understand,” Mollie now whispered back to her in a low voice. “What shall I do?”