Again!—that sound is repeated.

This time she comprehends its source: some one is tapping gently at the side window of the room.

Ellen hastily put on her gown once more, and advanced to the casement.

She raised the blind, and beheld the dark form of a man mounted upon a ladder, at the window. A second glance convinced her that he was the tall Italian whom she had before seen.

She approached as closely as possible, and said, in a low tone, "What do you require? what this strange proceeding?"

"I am come to save you," answered Filippo, in a voice so low, that his words were scarcely intelligible. "Do not be afraid—I am he who wrote the warning letter, which——"

Without a moment's farther hesitation, Ellen gently raised the window.

"I am he who wrote the warning letter which you received at the theatre," repeated Filippo. "Although ostensibly compelled to serve my master, yet privately I counteract all his vile schemes to the utmost of my power."

"I believe you—I trust you," said Ellen, overjoyed at the arrival of this unlooked-for succour. "What would you have me do?"