“I wish you to visit us secretly to-night, when I think I may be able to give you the evidence you are in search of. Of course it may require more than one visit to place you in possession of all the facts, but with what I can tell you should be fully prepared to act.” “Mrs. Gray, do you mean to tell me that you have discovered those who are directly at the bottom of the plot here against the Allies?” “Perhaps, sir. Please listen. You know where the Schutzenstrasse is, the street to the rear of our billet?” He nodded. “An alley leads from that directly to our house, but the alley may be under observation from the rear street. I would suggest, therefore, that you get into a rear yard somewhere to the east or west of that alley and follow along until you reach our billet. Our room will be dark, but I shall be at the window to let you in through it. Miss Briggs will be with me. The utmost caution must be observed, you must not speak a loud word while in our apartment; even a whisper may be overheard. I think it would be advisable for you to remove your shoes before you climb in through the window, as you might scrape the side of the house with them and give alarm.” The Intelligence officer regarded her narrowly. “Were I not in possession of more or less information as to your past performances, I might wonder if you were all there,” declared the officer, tapping his own head. “Perhaps I am not,” laughed Grace. “This evening should prove whether I am or not,” answered the Overton girl laughingly. “I am making a peculiar request, but we are dealing with peculiar people, shrewd, unscrupulous--desperate people. I think you had better come in at ten o’clock. You will have to wait a couple of hours, and perhaps I shall have to secrete you. You will not be over-comfortable, but I promise you that you will consider it well worth while, if things develop as I am expecting them to. May I depend upon you, sir?” “You may, Mrs. Gray.” “I would suggest that this matter be kept absolutely confidential between us. Miss Briggs knows that I am going to invite you to visit us, and it will be best that no other human being, outside of yourself, knows about it. I have come to the point where I am afraid to trust any one.” “Your wishes in the matter shall be observed. I thank you, Mrs. Gray,” answered the captain rising. “Happy to have come up with you,” he said in a louder tone. “One of these days we will make up a party for a sail on the river. You will find it well worth while.”