The Light of Western Stars by Zane Grey

As Stewart departed from one door Florence knocked upon another; and Madeline, far shaken out of her usual serenity, admitted the cool Western girl with more than gladness. Just to have her near helped Madeline to get back her balance. She was conscious of Florence's sharp scrutiny, then of a sweet, deliberate change of manner. Florence might have been burning with curiosity to know more about the bandits hidden in the house, the plans of the cowboys, the reason for Madeline's suppressed emotion; but instead of asking Madeline questions she introduced the important subject of what to take on the camping trip. For an hour they discussed the need of this and that article, selected those things most needful, and then packed them in Madeline's duffle-bags.

That done, they decided to lie down, fully dressed as they were in riding-costume, and sleep, or at least rest, the little remaining time left before the call to saddle. Madeline turned out the light and, peeping through her window, saw dark forms standing sentinel-like in the gloom. When she lay down she heard soft steps on the path. This fidelity to her swelled her heart, while the need of it presaged that fearful something which, since Stewart's passionate appeal to her, haunted her as inevitable.