But she couldn't bear to do that. It seemed too dreadful to tell Roger what had happened. She thought next of Kenneth, who was a standby as a loyal friend, but he was far downtown in his office, and might be busy with an important case. "Philip, of course," she said to herself; but even with her hand on the receiver, another thought flashed through her mind. "No one could help me to save Mona like Big Bill!" she thought, and on a sudden impulse she called up his hotel. "Bill,--it's Patty," she said, her voice trembling. "Yes, dear; what is it? What is the matter?" The kind, quiet voice, with its deep tones of sympathy and capability, made Patty realise that she had appealed to the right one. "Oh, Bill," she went on, "there's awful trouble, and you must help me." "Of course I will, Little Girl! Steady now; tell me what it's all about. Do you want me to come there?" "But you're just starting for the West," cried Patty, as she remembered this for the first time. "That doesn't matter, if _you_ want me. I'll be right over." "And wait a minute; tell me what you think we ought to do. I've heard from Anne that Mona is eloping with that awful Lansing man!" "Then there's no time to be lost! Take your little car, and go to The Plaza as fast as you can spin! I'll meet you there, in the Galbraiths' apartment." Bill hung up the receiver, without even a good-bye, and Patty gave a little sigh of relief, for it seemed as if he had taken the responsibility from her shoulders, and would manage the matter himself. She ordered her car, flung on her hat and coat, and with a hasty word to Mrs. Allen that she was going out, she drove her little electric herself down to the hotel. When she entered the Galbraiths' apartment, she found Farnsworth already there. "It's true," he said, looking at her with a grave face. "That is, I think it must be. Mona went away half an hour ago, and took a suit case with her. She went in a motor with Mr. Lansing. Anne is worried, because this morning she overheard the two telephoning." "I wasn't listening, Miss Patty," said the tearful maid. "That is, I didn't mean to, but Miss Mona was excited like, and her voice was so loud I couldn't help hearing." "I'm glad you did, Anne," said Patty, "it may help us to save Miss Mona yet. What else can you tell us?" "Nothing, except that Miss Mona left a note on her father's desk, and I thought maybe it might be to tell him she had gone." Big Bill strode over to the desk, and there, under a paperweight, lay a note, addressed to Mr. Galbraith. He picked it up, and looked at it, thoughtfully. "Patty," he said, "this isn't sealed. Considering all things, I think it is our duty to read it, but you know more about such matters than I do. What do you think?"