But, on the whole, having stood by his rights as he had, and having the pleasant consciousness of being true to his own principles, he was disposed to feel a glow of commendation, and later in the evening as Helen's splendid picture looked at him almost as if she was present, Walter said to himself: "I'm glad I spoke out. I'm glad." And then, because he had been brought up from a small boy to confide in his mother, he found great relief for his feelings that same night in writing to her. He mentioned no names, simply said that curiously soon after his mother had written as she did about guarding his own room from evil talk he had had an opportunity to do it. He did not dwell upon the matter at all, and did not take any special credit to himself for his action, but simply reminded his mother again of the difference in standards and conduct. He expressed gratitude that some of the fellows had at least silently stood by him. And he ended his letter by saying that he was almost on the edge of discovery of the arc light, although it still eluded him. For the next two weeks Walter was completely absorbed in his studies. Every spare hour he could get he pored and worked over his original problem. There were points about it which perplexed and exasperated him. Felix Bauer was as hard at work on the same problem as himself, and said one evening with a good-natured laugh that he believed he had mastered it. "All I lack is that one thing necessary what we call the 'Beduerfniss' the '_einege gewolite_,'" said Bauer, as he took off his shop cap and thoughtfully ran a lead pencil back and forth through the short curly hair over his ear. "That's all I lack," said Walter. "If I could get your '_einege gewolite,_' I would have my answer." "Hope you will get it," said Bauer, pleasantly, as he closed up his locker and went out to meet another class period. After he had gone, Walter worked on until he was the only person left in the workroom. He had the entire afternoon and evening, as it happened, and was so absorbed in his experiments that he was hardly aware of his being alone until he looked up and saw that the big room was empty, and that it was dusk. Without any thought of supper he turned on the light over his table and made some mathematical calculations. Then he ran out of paper and looked about over the litter of stuff in front of him for another piece, but not finding any, glanced naturally over to Bauer's table, which was next his own.