Callie's young man is Henniker, one of the trumpeters of K troop, --th cavalry; _the_ trumpeter, Callie would say, for though there are two of the infantry and two of the cavalry who stand forth at sunset, in front of the adjutant's office, and blow as one man the brazen call that throbs against the hill, it is only Henniker whom Callie hears. That trumpet blare, most masculine of all musical utterances, goes straight from his big blue-clad chest to the heart of his girl, across the clear-lit evening; but not to hers alone. There is only one Henniker, but there is more than one girl in the cottage on the common. At this hour, nightly, a small dark head, not so high above the sage as Callie's auburn one, pursues its dreaming way, in the wake of two cows and a half-grown heifer, towards the hills where the town herd pastures. Punctually at the first call it starts out behind the cows from the home corral; by the second it has passed, very slowly, the foot-bridge, and is nearly to the corner post of the Reservation; but when "sound off" is heard, the slow-moving head stops still. The cheek turns. A listening eye is raised; it is black, heavily lashed; the tip of a silken eyebrow shows against the narrow temple. The cheek is round and young, of a smooth clear brown, richly under-tinted with rose,--a native wild flower of the Northwest. As the trumpets cease, and the gun fires, and the brief echo dies in the hill, the liquid eyes grow sad. "Sweet, sweet! too sweet to be so short and so strong!" The dumb childish heart swells in the constriction of a new and keener sense of joy, an unspeakable new longing. What that note of the deep-colored summer twilight means to her she hardly understands. It awakens no thought of expectation for herself, no definite desire. She knows that the trumpeter's sunset call is his good-by to duty on the eve of joy; it is the pæan of his love for Callie. Wonderful to be like Callie; who after all is just like any other girl,--like herself, just as she was a year ago, before she had ever spoken to Henniker.