At about four o'clock on a windy, warm September afternoon, four girls came out of the post-office of Monroe, California. They had loitered on their way in, consciously wasting time; they had spent fifteen minutes in the dark and dirty room upon an absolutely unnecessary errand, and now they sauntered forth into the village street keenly aware that the afternoon was not yet waning, and disheartened by the slow passage of time. At five they would go to Bonestell's drug store, and sit in a row at the soda counter, and drink effervescent waters pleasingly mingled with fruit syrups and an inferior quality of ice cream. Five o'clock was the hour for sodas, neither half-past four nor half-past five was at all the same thing in the eyes of Monroe's young people. After that they would wander idly toward the bridge, and separate; Grace Hawkes turning toward the sunset for another quarter of a mile, Rose Ransome opening the garden gate of the pretty, vine-covered cottage near the bridge, and the Monroe girls, Sarah and Martha, in a desperate hurry now, flying up the twilight quiet of North Main Street to the long picket fence, the dark, tree-shaded garden, and the shabby side-doorway of the old Monroe house.