Often, at some one’s suggestion of a new idea, we ran off to explore the house again in search of the key to the Glenarm riddle, and always we came back to the library with that riddle still unsolved.

CHAPTER XXII

THE RETURN OF MARIAN DEVEREUX

“Sister Theresa has left, sir.”

Bates had been into Annandale to mail some letters, and I was staring out upon the park from the library windows when he entered. Stoddard, having kept watch the night before, was at home asleep, and Larry was off somewhere in the house, treasure-hunting. I was feeling decidedly discouraged over our failure to make any progress with our investigations, and Bates’ news did not interest me.

“Well, what of it?” I demanded, without turning round.

“Nothing, sir; but Miss Devereux has come back!”

“The devil!”

I turned and took a step toward the door.

“I said Miss Devereux,” he repeated in dignified rebuke. “She came up this morning, and the Sister left at once for Chicago. Sister Theresa depends particularly upon Miss Devereux,—so I’ve heard, sir. Miss Devereux quite takes charge when the Sister goes away. A few of the students are staying in school through the holidays.”