"Papa!" his daughter exclaimed, running forward anxiously. "What has happened? Where have you been? Are you hurt?" "No, yes, I guess not," the old man laughed good-naturedly. "Howdy do, doctor! They stopped the train out by Grand Crossing, and some fellows began firing stones. It was pretty lively for a time. I thought you and your mother would worry, so I got out of it the best way I could and came in on the street cars." "Poor papa!" the girl exclaimed, seizing his arm. She glanced at Sommers defiantly. Here was her argument. Sommers looked on coolly, not accepting the challenge. "Won't you come in, doctor?" Colonel Hitchcock asked. "Do come in and rest," his daughter added. But the young doctor shook his head. "I think I will go home and brush up--around the corner," he added with slight irony. The girl turned to her father and took his arm, and they slowly walked up the path to the big darkened house. CHAPTER XXI Sommers did not go to his rooms, however. He could delay no longer reaching Mrs. Preston. From the quiet decorous boulevard, with its clean asphalt pavement and pleasant trees, he turned at once into the dirty cross street. The oasis of the prosperous in the expanse of cheap houses and tawdry flat-buildings was so small! It was easy, indeed, to step at least physically from the one world to the other. At a little shop near the cable line he bought a hat and tie, and bathed his face. Then he took the cable car, which connected with lines of electric cars that radiated far out into the distant prairie. Along the interminable avenue the cable train slowly jerked its way, grinding, jarring, lurching, grating, shrieking--an infernal public chariot. Sommers wondered what influence years of using this hideous machine would have upon the nerves of the people. This car-load seemed quiescent and dull enough--with the languor of unexpectant animals, who were accustomed to being hauled mile by mile through the dirty avenues of life. His attention was caught by the ever repeated phenomena of the squalid street. Block after block, mile after mile, it was the same thing. No other city on the globe could present quite this combination of tawdriness, slackness, dirt, vulgarity, which was Cottage Grove Avenue. India, the Spanish-American countries, might show something fouler as far as mere filth, but nothing so incomparably mean and long. The brick blocks, of many shades of grimy red and fawn color, thin as paper, cheap as dishonest contractor and bad labor could make them, were bulging and lopping at every angle. Built by the half mile for a day's smartness, they were going to pieces rapidly. Here was no uniformity of cheapness, however, for every now and then little squat cottages with mouldy earth plots broke the line of more pretentious ugliness. The saloons, the shops, the sidewalks, were coated with soot and ancient grime. From the cross streets savage gusts of the fierce west wind