But how came the letter to be endorsed with words, intended by their writer only as a private memorandum, which were not true? This puzzled Robert, until he guessed, what really was the case, that Mr. Guyon had put Frere's letter and his reply away together, and had mistaken the one for the other. Why had he kept them at all? thought Robert; why had he put such dangerous and useless documents aside, thus running the risk of detection now realised? "He never could have intended to use them as a weapon against me," thought Robert, who had arrived at a tolerably correct appreciation of the character of his deceased father-in-law. "They convict him directly; me, though conclusively _to her_, only indirectly to others. Why on earth did he keep them?" Ah, why? Why is half the mischief that is done in the world done by the instrumentality of letters, which ought to have been read and destroyed, being treasured up instead by foolish women, or read and left about by men whom experience has not availed to teach? If Robert Streightley had quite understood Mr. Guyon's character, he would have known, in the first place, that that gentleman had never been in the habit of contemplating the contingency of his own death, or of making any preparation, temporal or spiritual, for that event; in the second, that his vanity was of so ominous a kind that he liked to indulge in the recollection of successful enterprises, no matter what their nature, and treasured up the trophies of his fortunate _coups_, as other people might keep love-tokens or relics of departed friends,--a ghastly perversion, it is true, but a characteristic trait of Mr. Guyon, as Robert came to learn, when he had to examine all the dead man's papers and personal effects. After all, it did not matter very much that this mistake had been made. Any one of the papers concerning this transaction, so endorsed, would have equally convicted her husband in Katharine's eyes. For a moment, when Robert perceived the error and recognised how it had occurred, a faint hope had sprung up in his heart that all might be explained, in explaining that he had never seen the draft of Mr. Guyon's letter to Gordon Frere; but it lasted only for a moment, and then left Robert more shame-stricken, more despairing than before.