The girl's appearance by this time had totally changed. All the dull, weary, depressed air and expression were gone; she was alert and erect, the beautiful eyes filled with life and eagerness, a dawning of colour in the cheeks, the brow busy with stirring thoughts. Esther's face was a grave face still, for a child of her years; but now it was a noble gravity, showing intelligence and power and purpose; indicating capacity, and also an eager sympathy with whatever is great and worthy to take and hold the attention. Whether it were history that Dallas touched upon, or natural science; the divisions of nations or the harmonies of plants; Esther was ready, with her thoughtful, intent eyes, taking in all he could give her; and not merely as a snatch-bite of curiosity, but as the satisfaction of a good healthy mental appetite for mental food. Until to-day the young man had never concerned himself much about Esther. Good nature had moved him to-day, when he saw the dullness that had come over the child and recognised her forlorn solitude; and now he began to be interested in the development of a nature he had never known before. Young Dallas was a student of everything natural that came in his way, but this was the first bit of human nature that had consciously interested him. He thought it quite worth investigating a little more. CHAPTER IV. _LEARNING_. They had a most delightful walk. It was not quite the first they had taken together; however, they had had none like this. They roved through the meadows and over the low rocky heights and among the copsewood, searching everywhere for flowers, and finding a good variety of the dainty and delicate spring beauties. Columbine, most elegant, stood in groups upon the rocks; _Hepatica_ hid under beds of dead leaves; the slender _Uvularia_ was met with here and there; anemone and bloodroot and wild geranium, and many another. And as they were gathered, Dallas made Esther observe their various features and family characteristics, and brought her away from Christopher's technical phraseology to introduce her instead to the living and everlasting relations of things. To this teaching the little girl presently lent a very delighted ear, and brought, he could see, a quick wit and a keen power of discrimination. It was one thing to call a delicate little plant arbitrarily _Sanguinaria canadensis;_ it was another thing to find it its place among the floral tribes, and recognise its kindred and associations and family character. On their way home, Dallas proposed that Esther should stop at his house for a minute, and become a little familiar with the place where she was to come to study Latin; and he led her in as he spoke.