ten o'clock at night
He was on the road to the discovery . Walter stared at the paper again and wished he had never seen it . For he was face to face with a real temptation , one of the hardest and most alluring his young manhood had ever confronted , and he was afraid , as he continued to stare at the diagram made by Felix Bauer . IT was ten o'clock at night when Walter finally went out of the shop and up to his room . He did not turn on the light at once , but went over by his table and sat down . The temptation he still faced had assumed alluring shapes . In the first place , he was saying to himself , `` Bauer 's drawings differ only a trifle from my own and I had practically gone as far as he , only one or two points were suggested to me by his diagram of the electrodes resting at an angle on the porcelain plate .