"How very unfortunate," said Ena Pollen, with quick sympathy, and in pretence that she knew nothing whatever of her fellow-guest’s identity, or of her past, whereas she knew every fact of importance concerning her. "I live in London, and though I travel a good deal, mostly on the Continent or in Egypt, I must say that I think Loch Lomond really beautiful. I took a long ramble by the lochside yesterday afternoon, and found it most enjoyable." "Ah!" said Mrs. Morrison. "You must take the trip over to Stronachlachar and up Katrine. It is quite pretty, but not so grand as this. Besides, there are always too many trippers in the Trossachs. But while you are here you must really go across and see Ellen’s Isle." And so the pair, seated in the garden with the sunlit waters at their feet, gossiped on, and quickly became good friends. That same evening, indeed, Mrs. Morrison invited the lady from London up to her sitting-room to take coffee after dinner, and there they sat gossiping and smoking cigarettes until it was time to retire. When Ena Pollen gained her room she locked the door, and, flinging herself into a small easy chair, exclaimed beneath her breath: "Thank Heaven! That’s over! The first few hours when one cultivates a friendship are always full of pitfalls. A word in the wrong place, and the person one seeks to know may instantly conceive a strong dislike. In this case, however, the woman has approached me. It was a good job I got up here first." Ena Pollen was much fatigued by the recent rapid journeys to and fro to Scotland, over to Paris and back, and then north again to Loch Lomond. She was, however, a cosmopolitan, and had travelled very extensively ever since she had been left a widow ten years earlier. Her husband had been a solicitor, whose practice was in Bedford Row, but after his death she had embarked upon an adventurous career which had culminated in her association with Bernard Boyne and his wife. That association had brought her considerable wealth—sufficient, indeed, to allow her, through payments from Boyne and his wife, to live in an expensive flat and indulge in jewellery, furs, smart frocks, and all that appealed to her natural vanity. That evening, however, she felt worn out. The strain of ingratiating herself with Mrs. Morrison of Carsphairn, whom she found to be an exceedingly shrewd woman, had been considerable, and this, combined with the fact that she had taken a long walk that afternoon, had utterly fagged her. From a tiny silver tube with a cap upon it, which she took from her dressing-case, she extracted a single little white tabloid, and swallowed it. "I wonder—I wonder if we shall really be successful?" she murmured to herself. "There must be no slip this time—no recurrence of that unfortunate contretemps in the Martin affair. Phew! That was a narrow shave. I was in Melun only just in time. A few days later, and all chance of dispelling suspicion would have gone!"