Far away her lost lover was deep in the study of carbon—so she thought. That must be an awfully difficult subject, and she must begin with something easier. She plunged into oxygen, and did so with as much joy as ever she plunged from a rock into her river. It did not spoil the St. Mary’s to be made mostly of oxygen. She found it more beautiful than ever. The feel and look and taste and rush of it were all there, only now she was getting deeper into it. Her own body was mostly composed of the St. Mary’s, and now a swim was like being stroked by one’s own mother. With great care she prepared some oxygen by heating potassium chlorate, and watched a bit of iron wire burn in it with dazzling brightness. By the same element her own body was daily burning, a slow and steady flame in the midst of the earth’s vapors. But how amazing that the flame of oxygen burst out so rarely! It puzzled her that her island, though half oxygen, should be crystalline and cold. She ran over the list of elements and was astonished to find them arranged in a sort of musical scale. Each octave began with a sharp metallic clang and then became less metallic. She wondered why some great composer had not perceived this and written a symphony about it. In the evenings she began to improvise on the little old rosewood piano. When her fingers went flickering upward into the treble with soft murmurs or bright passion, and her delighted old father would ask her what she was playing, she would answer, “Oh, only oxygen.” She was equally astonished to find that if she read the successive octaves downward, the elements fell into families. Thus oxygen was related to sulphur, chromium, selenium, molybdenum, tellurium, and tungsten. How in the world could anything so light as oxygen be like anything so heavy as tungsten? Sulphur was the only one of that family she knew when she met it. So she melted some crystals of sulphur and froze them into long needles, while Agricola lay by the little stove concealing his sulphur beneath his color. She knew now what a solid is, and that only crystals are true solids. As for sulphuric acid, which is perhaps the most useful of all chemicals, she chiefly wondered why it or anything else was acid. The year 1919 came to a close, leaving her with a sense of almost nothing accomplished, but grateful that she had found a wonderful new interest to keep her from moping. If she could not share Marvin’s life, she could follow him afar off and feel him nearer.