I - The Threat–––––––– WHEN A YOUNG MAN IS very much in love with a most attractive girl he is apt to endow her with qualities and virtues which no human being has ever possessed. Yet at rare and painful intervals there enter into his soul certain wild suspicions, and in these moments he is inclined to consider the possibility that she may be guilty of the basest treachery and double dealing. Everybody knew that Kenneth McKay was desperately in love. They knew it at the bank where he spent his days in counting other people's money, and a considerable amount of his lunch hour writing impassioned and ill-spelt letters to Margot Lynn. His taciturn father, brooding over his vanished fortune in his gaunt riverside house at Marlow, may have employed the few moments he gave to the consideration