Then, with a rush, a great temptation assailed Katherine--to destroy this piece of evidence unfavourable to her father which she held in her hands. For several moments the struggle continued fiercely. But she had made a vow with herself when she had entered law that she was going to keep free from the trickery and dishonourable practices so common in her profession. She was going to be an honest lawyer, or be no lawyer at all. And so, at length, she laid the check before her father. "Just indorse it, and we'll send it in to the hospital," she said. Afterward it occurred to her that to have destroyed the check would at the best have helped but little, for the prosecution, if it so desired, could introduce witnesses to prove that the donation had been sent. Suspicion of having destroyed or suppressed the check would then inevitably have rested upon her father. This discovery of the check was a heavy blow, but Katherine went doggedly back to the first beginnings; and as the weeks crept slowly by she continued without remission her desperate search for a clue which, followed up, would make clear to every one that the whole affair was merely a mistake. But the only development of the summer which bore at all upon the case--and that bearing seemed to Katherine indirect--was that, since early June, the service of the water-works had steadily been deteriorating. There was frequently a shortage in the supply, and the filtering plant, the direct cause of Doctor West's disgrace, had proved so complete a failure that its use had been discontinued. The water was often murky and unpleasant to the taste. Moreover, all kinds of other faults began to develop in the plant. The city complained loudly of the quality of the water and the failure of the system. It was like one of these new-fangled toys, averred the street corners, that runs like a miracle while the paint is on it and then with a whiz and a whir goes all to thunder. But to this mere by-product of the case Katherine gave little thought. She had to keep desperately upon the case itself. At times, feeling herself so alone, making no inch of headway, her spirits sank very low indeed. What made the case so wearing on the soul was that she was groping in the dark. She was fighting an invisible enemy, even though it was no more than a misunderstanding--an enemy whom, strive as she would, she could not clutch, with whom she could not grapple. Again and again she prayed for a foe in the open. Had there been a fight, no matter how bitter, her part would have been far, far easier--for in fight there is action and excitement and the lifting hope of victory.