"_I_ shall be that rider," Beth said solemnly. "And the moment you see me, take this blue missive, and place it on the Flat Rock, with a stone on it to keep it from blowing away; then go home. If I do not appear before sunset, here is a red missive to place on the Flat Rock instead of the blue one, which must then be destroyed by fire. If I return, I return; if not, never breathe a word of these things to a living soul as you value your life." "I would rather die than divulge anything," Charlotte protested solemnly, and her choice of the word divulge seemed to add considerably to the dignity of the proceedings. They separated with a casual nod, that people might not suspect them of anything important, and each proceeded to act her part in a delightful state of excitement; but what was thrilling earnest to Charlotte, calling for courage and endurance, was merely an exhilarating play of the fancy put into practice to Beth. By the time Charlotte arrived at the top of the hill, and had settled herself among the firs overlooking the road below, she was very tired. Beth had given her a bag, one of Aunt Victoria's many reticules, with orders not to open it before her watch began. The bag had been a burden to carry, but Charlotte was repaid for the trouble, for she found it full of good things to eat, and a bottle of cold coffee and cream to drink, with lumps of sugar and all complete. Beth had really displayed the most thoughtful kindness in packing that bag. The contents she had procured on a sudden impulse from a pastry-cook in the town, by promising to pay the next time she passed. After having very much enjoyed a solid Melton Mowbray pie, a sausage in puff-pastry, a sponge-cake, a lemon cheesecake, and two crisp brandy snaps, and slowly sipped the coffee, Charlotte felt that this was the only life worth living, and formally vowed to dedicate herself for ever to the Secret Service of Humanity--Beth's name for these enterprises. She kept a careful eye on the road below all this time, and there ran through her head the while fragments of a ballad Beth had written, which added very much to the charm of the occasion. "The fir-trees whisper overhead, Between the living and the dead, I watch the livelong day. I watch upon the mountain-side For one of courage true and tried, Who should ride by this way," it began. When she first heard that Beth had written that ballad, Charlotte was astonished. It was the only assertion of Beth's she had ever doubted; but Beth assured her that any one could write verses, and convinced her by "making some up" there and then on a subject which she got Charlotte to choose for her.