I wish to acknowledge here my obligations to Sister Margaret for giving me the benefit of her care and resourcefulness on that difficult day. There was no nice detail that she overlooked, no danger that she did not anticipate. She sat by Miss Pat on the long drive, while Rosalind and I chattered nonsense behind them. We were so fortunate as to strike the first battalion, and saw it go into camp on a bit of open prairie to await the arrival of the artillery that followed. But at no time did I lose sight of the odd business that still lay ahead of me, nor did I remember with any satisfaction how Helen, somewhere across woodland and lake, chafed at the delayed climax of her plot. The girl at my side, lovely and gracious as she was, struck me increasingly as but a tame shadow of that other one, so like and so unlike! I marveled that Miss Pat had not seen it; and in a period of silence on the drive home I think Rosalind must have guessed my thought; for I caught her regarding me with a mischievous smile and she said, as Miss Pat and Sister Margaret rather too generously sought to ignore us: "You can see now how different I am--how very different!" When I left them at St. Agatha's with an hour to spare before dinner, Sister Margaret assured me with her eyes that there was nothing to fear. I was nervously pacing the long terrace when I saw my guests approaching. I told the butler to order dinner at once and went down to meet them. Miss Pat declared that she never felt better; and under the excitement of the hour Sister Margaret's eyes glowed brightly. "Sister Margaret is wonderful!" whispered Rosalind. "Aren't my clothes becoming? She found them and got me into them; and she has kept me away from Aunt Pat and taken me over the hard places wonderfully. I really don't know who I am," she laughed; "but it's quite clear that you have seen the difference. I must play up now and try to be brilliant--like Helen!" she said. "I can tell by the things in Helen's room, that I'm much less sophisticated. I found his photograph, by the way!" "What!" I cried so abruptly that the others turned and looked at us. Rosalind laughed in honest glee. "Mr. Gillespie's photograph. I think I shall keep it. It was upside down in a trunk where Sister Margaret told me I should find these pretty slippers. Do you know, this playing at being somebody else is positively uncanny. But this gown--isn't it fetching?" "It's pink, isn't it? You said that photograph was face down, didn't you?" "It was! And at the very bottom under a pair of overshoes." "Well, I hope _you_ will be good to him," I observed. "Mr. Donovan," she said, in a mocking tone that was so like Helen's that I stared stupidly, "Mr. Donovan, you are a person of amazing penetration!"