Nevertheless Mr. Gryce was proud of the gain he had made in his talk with Mrs. Duclos, and he smiled as he thought of his next interview with Sweetwater. Assurance will often accomplish much, it is true, but it sometimes needs age to make it effective. He could not imagine either Mrs. Duclos or her daughter yielding to the blandishments of one even as gifted in this special direction as Sweetwater. Authority was needed as well--the authority of long experience and an ineradicable sympathy with human nature. Thus he gratified himself with a few complacent thoughts. But when he stopped to think what a great haystack New York was, and how elusive was the needle which had escaped them now these three times, his spirits sank a trifle, and by the time he had ridden a half-block on his way back to Headquarters, he was at that low ebb of disheartenment from which only some happy inspiration can effectually lift one. He was glad to be able to report that he had learned a few important facts in regard to Madame Duclos, but he equally hated to admit that for all his haste in following up the clue given him, he knew as little as ever of her present whereabouts; and hated even worse to have to give the cue which would lead to a surveillance, however secret, over a house which held a child of so sensitive and tremulous a nature as that of the little friend who had picked up his stick in front of the drug-store. He was recalling to mind the pathetic spectacle presented by her agitated little figure, when his eyes chanced to fall upon a small shop he was then passing. It was devoted to ladies' furnishings, and as he took in the contents of the window and such articles as could be seen on the shelves beyond, a happy thought came to him. Madame Duclos had left her hotel in a hurry, carrying but few of her belongings with her. A lady of cultivated taste, she must have missed many articles necessary to her comfort; and having money would naturally buy them. Prevented by her fears from going downtown, or even from going anywhere in the daytime, what was left for her to do but to patronize some such small shop as this. Its nearness to her late refuge, as well as its neat and attractive appearance, made this seem all the more likely. A question or two would suffice to settle his mind on this point and perhaps lead to results which might prove invaluable in his present emergency. Signaling to the chauffeur to stop, he got out in front of this little shop, toward which he immediately proceeded, with an uncertainty of step not altogether assumed. He did have some rheumatic twinges that day.