"Good," said Dawson. "What I want of you is this. Whenever here in London you see a French or Belgian officer wearing the badges of the Flying Corps, mark him down. Make his acquaintance somehow; you will know how. Entertain him, fascinate him, let him entertain you; fool him as you would fool me if I let you; worm out his secrets, if he has any. If you get upon a promising track, go strong; let the man make love to you--he will, whoever he is, if you give him half a chance--intoxicate him with those confounded eyes of yours. If you can find only one who is in the enemy's service, you will be fully repaid for all your trouble." "It is a largish contract," murmured Madame thoughtfully. "There are not so very many flying officers," said Dawson, "and they are all young. You will work through them pretty quickly. Most of them will be the genuine article upon whom you need not waste much time. But the others, those whom I suspect, you must grab hold of and never let go, whatever happens." "I hope," said Madame primly, "that you do not expect me to do anything--improper." Dawson stared at her in wonder. Her big eyes, shining with the lovely innocence of childhood, met his without a flicker. "Bless my immortal soul," he muttered, "she is getting at me again." Then aloud, and gravely--"My assistants are always expected to conduct themselves with the strictest propriety." Madame laughed softly. "I have known many men in my time, Mr. Dawson, but I have never enjoyed any man so much as I do you." "I appear to have rather a roaming commission," Madame Gilbert went on, after a thoughtful pause. "Can you not give me any guidance?" "Not at present. I am testing an idea, that is all. You must be guided by your own wit and judgment, in which I have the utmost confidence. Don't waste your time or fascinations on the wrong people. Find out if among the French or Belgian flying officers, who from time to time visit London, there are any whose connections and movements will repay close watching here and at the Front. Sift them out. When you get upon a track which seems promising, follow it up, and do not be--what shall I say?--do not be too squeamish. Money is no object. Behind us is the whole British Treasury, and you can have whatever you want. Will you take on the contract, madame?" "I will do my best," she replied soberly, "and I will not be--too squeamish. I can look after myself, my friend."