THERE are few positions in social life of greater trial and responsibility than that of a step-mother; and it too rarely happens that the woman who assumes this position, is fitted for the right discharge of its duties. In far too many cases, the widower is accepted as a husband because he has a home, or a position to offer, while the children are considered as a drawback in the bargain. But it sometimes happens, that a true woman, from genuine affection, unites herself with a widower, and does it with a loving regard for his children, and with the purpose in her mind of being to them, as far as in her power lies, a wise and tender mother. Such a woman was Agnes Green. She was in her thirty-second year when Mr. Edward Arnold, a widower with four children, asked her to become his wife. At twenty-two, Agnes had loved as only a true woman can love. But the object of that love proved himself unworthy, and she turned away from him. None knew how deep the heart-trial through which she passed--none knew how intensely she suffered. In part, her pale face and sobered brow witnessed, but only in part; for many said she was cold, and some even used the word heartless, when they spoke of her. From early womanhood a beautiful ideal of manly excellence had filled her mind; and with this ideal she had invested one who proved false to the high character. At once the green things of her heart withered and for a long time its surface was a barren waste. But the woman was yet strong in her. She must love something. So she came forth from her heart-seclusion, and let her affections, like a refreshing and invigorating stream, flow along many channels. She was the faithful friend, the comforter in affliction, the wise counsellor. More than once had she been approached with offers of marriage, by men who saw the excellence of her character, and felt that upon any dwelling, in which she was the presiding spirit, would rest a blessing. But none of them were able to give to the even pulses of her heart a quicker motion. At last she met Mr. Arnold. More than three years had passed since the mother of his children was removed by death, and, since that time, he had sought, with all a father's tenderness and devotion, to fill her place to them. How imperfectly, none knew so well as himself. As time went on, the want of a true woman's affectionate care for his children was more and more felt. All were girls except the youngest, their ages ranging from twelve downward, and this made their mother's loss so much the more a calamity. Moreover, his feeling of loneliness and want of companionship, so keenly felt in the beginning, instead of diminishing, increased.