Every morning mother gave them their porridge, locked the door, and went away to work, leaving something for the children’s dinner, and Lizzie to take care of herself and Billy till night. There was no other way, for both were too helpless to be trusted elsewhere, and there was no one to look after them. But Lizzie knew her way about the room, and could find the bed, the window, and the table where the bread and milk stood. There was seldom any fire in the stove, and the window was barred, so the little prisoners were safe; and day after day they lived together a sad, solitary, unchildlike life that makes one’s heart ache to think of. Lizzie watched over Billy like a faithful little mother, and Billy did his best to bear his trials and comfort sister like a man. He was not a rosy, rollicking fellow, like most year-old boys, but pale and thin and quiet, with a pathetic look in his big blue eyes, as if he said, "Something is wrong; will some one kindly put it right for us?" But he seldom complained unless in pain, and would lie for hours on the old bed, watching the flies, which were his only other playmates, stretching out his little hands to the few rays of sunshine that crept in now and then, as if longing for them, like a flower in a cellar. When Lizzie sang, he hummed softly; and when he was hungry, cold, or tired, he called, "Lib! Lib!" meaning "Lizzie," and nestled up to her, forgetting all his baby woes in her tender arms. Seeing her so fond and faithful, the poor neighbors loved as well as pitied her, and did what they could for the afflicted child. The busy women would pause at the locked door to ask if all was right; the dirty children brought her dandelions from the park; and the rough workmen of the factory opposite, with a kind word, would toss an apple or a cake through the open window. They had learned to look for the little wistful face behind the bars, and loved to listen to the childish voice which caught and imitated the songs they sang and whistled, like a sweet echo. They called her "the blind lark;" and though she never knew it, many were the better for the pity they gave her. Baby slept a great deal, for life offered him few pleasures, and like a small philosopher, he wisely tried to forget the troubles which he could not cure; so Lizzie had nothing to do but sing, and try to imagine how the world looked. She had no one to tell her, and the few memories grew dimmer and dimmer each year. She did not know how to work or to play, never having been taught, and mother was too tired at night to do anything but get supper and go to bed. "The child will be an idiot soon, if she does not die," people said; and it seemed as if this would be the fate of the poor little girl, since no one came to save her during those three weary years. She often said, "I’m of _some_ use. I take care of Billy, and I could n’t live without him."