Billy sat in his chair before the McAlisters' front steps. Theodora sat beside him on the steps, with her chin in her hands. Though it was late in January, the midday sun was warm around them, and they were basking in it like two young turtles.

"I know," Theodora was saying restively; "but I want to do something really and truly useful, something that will help on the world. Here I am, sixteen years old, and I've never been of the least use to anybody."

"How about me?" Billy suggested, luxuriously stretching and then clasping his hands at the back of his head.

"You? Oh, you don't count."

"Thanks."

Theodora sprang up and whirled the chair to the gate and back again to the steps.

"What a tease you are, Billy! Next time, if you don't behave, I'll tip you out. You know what I mean. I get just as much fun out of this as you do. What I want is to help on the masses."

"Rats!" Billy remarked profanely.

"Not rats at all. You don't need me; they do."

"So do I. Who takes me all over town?"

"That's selfish, Billy. They need me more than you do, then."

"No, they don't either. Who'd take me?"

"Patrick. Besides, you'll take yourself soon, and then you won't want me any more."

There was a little involuntary note of sadness in her tone, and Billy smiled to himself, as he shifted his position to face her.

"What's started you to talking all this flummery, Ted?" he asked bluntly, heedless, in true boy fashion, of the vague aspirations and aims of sweet sixteen. "I thought you had too good sense to get sentimental."

The word stung Theodora, and she started up abruptly.

"Let's go to the shore," she said shortly.

"Aren't you too tired? I am growing fat and heavy, you know."

For a week, now, Billy had been installed at the doctor's, while his mother had been called away by the illness of her only brother. The arrangement suited them all, Billy and Theodora even more than the others. The two friends never seemed to weary of the long hours they spent together, never appeared to be at a loss for subjects of conversation. For the most part, Hubert was with them; but there were times, like the present, when his other friends demanded his whole attention, and Billy and Theodora were left to each other's society. Hope was absorbed in other interests, though she was always kind and considerate of their guest; and, by a tacit consent, Phebe's company was shunned rather than courted.

The winter had been good to Billy. Day by day, his strength was coming back to him, slowly and by almost imperceptible stages, it is true; but by looking back from month to month, they could see his steady progress. In his better days, he could walk about the rooms now, and even this slight advance had put fresh life into him.

"Some day, I may begin to have a little respect for myself again," he had said to Hubert, the day after his first expedition across the library. "I've been like a rag doll for so long that I began to think I'd never stir alone any more. Now it looks more as if I might be somebody in time, and I can wait."

"Strikes me you've been waiting about long enough," Hubert returned impatiently. "I wish you'd hurry up and come to life. There's fun enough to be had, as soon as you're on your legs again."

"I should think it would seem queer to you to see me walking," Billy observed reflectively.

"It does. I can't make it seem a part of you, somehow. I'm so used to the chair," Theodora said, as she joined the group. "After all, Billy, I think I shall miss it a little."

Well she might, for by this time the chair had become a part of her life. Leaving Patrick to his own devices, the two young people had explored the town, wandering here and there as Billy's curiosity or Theodora's whim took them. There were days when Billy was too weak for his ride, there were days when Theodora was too busy with other things to take him out during the warmer part of the day; but, as a rule, three or four times a week they wandered away in search of fresh scenes and an occasional adventure.

"By the way, Ted, how comes on the story?" Billy asked, as they drew near the steps once more and Mulvaney came forward to meet them.

"Seventeen chapters are done," she answered, slackening her pace a little.

"Moses! How many do you expect to have?"

"I don't know. They seem to count up awfully fast. I've only just come to the first of the lovering. I can't seem to make much of that. I do wish I knew how people make love."

"Perhaps you'll find out, some day," Billy suggested.

But Theodora frowned on him.

"Don't be silly. I'm not that kind, nor you either. I wish you could help me out on it. Don't people ever—"

"Collaborate? Yes. When are you going to read it to me?"

"Do you really want it?"

"Yes."

"Well, to-night, perhaps, if we can get away by ourselves."

However, fate willed otherwise.

"Theodora," the doctor said, as they were leaving the dinner-table, that day; "there's an errand I'd like you to do for me, about four o'clock. I promised to send some medicine down to a house in Water Street for a sick baby. Can you take it down? It's nothing catching," he added reassuringly to his wife.

"I'll go. Can I take Billy?"

"Better not. It's a wretched region for wheels, and you might have an upset," the doctor advised. "Come to the office, soon after four, and I'll have it ready. You're getting to be your father's right-hand man, Teddy." And he rested his hand affectionately on her shoulder before he left the room.

A month before that time, Mrs. Farrington had received a visit from an old college friend, one of the energetic workers in the university settlements, and her stories of life in the slums had made a strong impression upon Theodora's mind. For the time being, other interests lost their charm. Theodora was content to sit by the hour and listen to the experiences so remote from her own sheltered life. She was as impressionable as most girls of her age; more than most girls, she retained her impressions, dwelling upon them and magnifying them until they seemed to become less a day-dream than a part of her actual experience.

For the past three weeks, she had been filled with vague, restless longings to have a share in the vast work of social reform; most of all, her warm young heart turned to the neglected children. It was the same impulse of protection which had first roused her interest in Billy Farrington, the helpless invalid; and now, had Billy been a less well-tried friend, he might have found himself forsaken to make room for this new hobby of Theodora. As it was, she merely used him for a safety-valve, and poured into his ears mysterious hints of the career for which she was temporarily yearning.

The medicine was delivered, and, in the gathering dusk, Theodora's face was turned towards home. It was a part of the town into which she rarely penetrated,—a network of squalid streets near the water front; and, a month ago, she would have swept through them with her nose in the air. Now, however, she looked to the left and the right, as she walked onward, hoping almost against hope that her secret prayers would be answered, and that, even in this hasty progress, she might see some work ready for her hand. Providence, always kind, was in a benign mood, and her desire was fulfilled with unexpected promptness.

Down the street towards her came a forlorn little figure. It was a child of nine, a girl whose grimy face was streaked and swollen with tears, whose red hood was faded to a dull yellowish shade, whose coarse gray coat was so many sizes too large for her that the sleeves were folded back to allow her blue, chapped hands to come forth to the light of day and to their destined usefulness. Theodora's heart gave a quick bound, and, stepping forward, she bent over the wailing child.

"What is the matter?" she asked.

The child stopped sobbing and blinked up at her, disclosing a face of unmistakably Keltic ancestry.

"What is the matter?" Theodora repeated.

"Huh?"

Theodora experienced a momentary shock. Not thus had her dreamed-of foundlings answered to her imaginary queries. She rallied and reiterated her question. The child's tears fell again.

"I'm—I'm losted, and I'm tired and so hungry."

Even in this woful climax, Theodora noted the gurgle of the child's sobs. She told herself that it was like water bubbling from a bottle, a large earthen bottle. Then she reproached herself for her misplaced sense of humor.

There followed a little question, a little answer, a little consolation. Then, before she quite realized what she was doing, Theodora was walking rapidly towards home, with brotherly love swelling in her heart, and the child's smutty hand clasped in her woollen mitten. She had delayed longer than she knew, the walk home was long, and before she reached there, the twilight had quite fallen, the house was brightly lighted, and the family were gathered in the dining-room.

"Dear me, they're all at supper!" she said to herself, as she went up the steps. "Never mind, little girl," she added, with a conscious patronage which not even her sympathy could keep down. "They're having their supper now. I'll take you up to my room, and, as soon as they're through, I'll give you something to eat."

Her feminine intuition told her that the child's welcome would not be so warm if she were presented at the supper-table. For a moment, she hesitated what disposition to make of her charge. Then, herself hungry and eager to get to the table and tell the story of her adventure, she led the way to her room and popped the child into her own dainty bed.

Mrs. McAlister looked up as Theodora entered the room.

"You are late, Teddy, and I was just getting anxious about you. Archie, this is my twin daughter, Theodora. Teddy dear, this is my dear brother Archie, come at last." There was an exultant note in Mrs. McAlister's voice which Theodora had never heard before.

Theodora gave a quick glance at the stranger who sat between her stepmother and Hope, and the first look told her that she had found a friend, one who would be true and loyal as a man could be. There was nothing especially distinctive about Archie Holden. He was tall and blond and athletic, sufficiently good-looking, and with easy, off-hand manners. But his keen blue eyes, the curve of his little blond mustache, above all, the grip of his hand and the ring of his voice suited Theodora, and, long before supper was over, she had forgotten her protÉgÉe in the excitement of the unexpected addition to their family circle. It was fortunate, perhaps, that the child, more tired than hungry, had fallen asleep in the midst of Theodora's soft white bed.

As they were leaving the table, Mrs. McAlister laid a detaining hand on Theodora's arm.

"Teddy, I've had to put Archie into your room, to-night. Can you sleep in the little back chamber? I am sorry to turn you out, but Billy has the spare room, and I didn't like to put Archie with him. Do you mind, dear? It's only for one night; then we can make some other arrangement."

"I don't care at all," Theodora answered readily. "It wouldn't do to put him in with Billy. When did Mr. Holden come?"

"At five. It was such a surprise, too. You know we didn't expect him for a week; but the heavy snow sent the party in, and he is to have a vacation till the middle of March. What do you think of my little brother, Teddy?"

"I think he's splendid," Theodora replied so emphatically that her mother smiled.

"Run along after him, then," she said. "I want you and Hope to see that his visit is a good one. Hope took your things into the back room, Teddy, so you'll find everything ready for you at bedtime."

To Theodora's eager young mind, it seemed that the evening was the shortest she had ever spent, and, when ten o'clock struck, she was still sitting perched on the arm of Hope's chair, while she listened to Archie's stirring tales of life in camp and field, in mountain and caÑon and desert. Then there was an interruption, for the bell rang and a voice was heard asking for the doctor. Archie rose.

"Another patient, doctor? I believe I'll go to bed. Three nights in a sleeper are too much for me. No, don't come with me, Bess; I know the way perfectly."

However, Mrs. McAlister went to his door with him. As she came downstairs, her husband met her in the hall.

"I don't quite comprehend this mystery, Bess," he said, while an anxious frown puckered his brows. "There's a policeman here that accuses me of having abducted a child. There's one missing from Water Street, it seems, and he claims that she is here in this house."

"What?"

"'Tis a remarkable story. I can't seem to get at the bottom of it. He doesn't know me; and he says his orders are not to go away without the child. I can't convince him that there's no child here."

Just then they both started violently, for a double sound broke on their ears, a long-drawn shriek as of a child in pain, followed by Archie's voice, loud and remorseful,—

"Oh, by George!"

An instant later, Theodora appeared on the landing, ejaculating,—

"Gracious me! I forgot her."

"Theodora, what does this mean?" the doctor demanded breathlessly, as he rushed up the stairs. Then, at the open door, he paused in sheer amazement. In the middle of the floor stood Archie Holden, staring at the bed with a face devoid of all expression. Sitting up in the bed and staring back at him with a face of injured innocence and pain, was an unwholesome child of Keltic extraction and unneat exterior, with a dingy knitted hood in lieu of nightcap, and two chapped hands appearing from two vast gray sleeves.

Archie appeared to think that it devolved upon him to explain the situation.

"I'm sorry," he said meekly. "You see, I didn't turn up the gas at first, but I just sat down on the edge of the bed to take off my shoes. I didn't know this—this young person was here, and I suppose I sat on her. But really I can't imagine where she came from. I didn't bring her."

"Theodora!" said the doctor, sternly.

But Theodora had vanished, to hide her head from the sight of her protÉgÉe, and from the merriment shining in Archie's blue eyes.