But Mary’s mind was an inquiring one and she liked to get at the bottom of all puzzling things. Why was it that Beatrice Colchester talked so much about one uncle and never mentioned his brother?

In a pause in the conversation she asked:

“But where is the Duke of Kilkenty?”

Beatrice looked hastily across at her grandmother, who was talking with Miss Campbell. Then she pressed her finger to her lips and shook her head.

“Never ask that question here,” she said in a low voice.

Mary hung her head in great embarrassment. It was quite natural to have inquired about the Duke of Kilkenty. But she had always heard that some English families had mysterious secrets hidden away! It was a relief presently when Miss Campbell rose and gave the signal to depart. It was growing late and somehow a gloom seemed to have settled over the place. The bright room was filled with shadows and the girls had grown remarkably quiet.

How glad they would be to return to their own home-like, pretty lodgings again, where they could slip into dressing-gowns and the neat little maid would bring their dinner up to their sitting-room!

Having paid their respects to the old noblewoman and invited Beatrice to come to see them, they presently left the gray house and turned their faces toward Westminster Chambers and their own cheerful rooms.

CHAPTER XII.—A MEETING ON LONDON BRIDGE.

There were two reasons why Billie and Nancy went out alone to take a walk one afternoon some ten days after their arrival in London.