"Let it go so, then," Lizette answered. "Maybe it will be best, for I'm pretty well tired out myself with the heat, and worrying over Olga, and all. I knew she was overworking but I couldn't help it." On the way home Elizabeth was silent until Sadie broke out gloomily, "I s'pose if she don't get better you won't go to the camp, 'Lizabeth." "O, _no_, I couldn't go away and leave her sick--of course, I couldn't." "Huh!" growled Sadie. "You don't think about _me_, only just about Olga, and she isn't your sister." At another time Elizabeth would have smiled at this belated claim of relationship, but now she said only, "Olga has been so good to me, Sadie--I never can forget it--and now when I have a chance to do a little for her, I'm so _glad_ to do it! I couldn't enjoy the camp if I left her here sick, but it won't make any difference to you. You can go just the same." Sadie's face cleared at that. "We-ell," she agreed, "I might just as well go. I couldn't do anything much for Olga if I stayed; and maybe, anyhow, she'll get well before the tenth. I'm most sure she will." "O, I hope so," Elizabeth sighed, but she was not thinking of the camp. Anxious weeks followed, for Olga was very sick. Day after day the fever held her in restless misery, and when at last it yielded to the treatment, it left her weak and worn--the shadow of her former self. Then one morning Miss Laura came, and carried her and the nurse off to the yacht, and there followed quiet, restful, beautiful days for Olga--such days as she had never dreamed of. Judge Haven and Jim, and Jo Barton were on the yacht, but she saw little of any one except Miss Laura and the nurse, and day by day strength came back to her body as the joy of life flooded her soul. One night sitting on deck in the moonlight, she said suddenly, "Miss Laura, I'm glad of this sickness." "Why?" "Because I've learned a big lesson. I've learned why Camp Fire Girls must 'Hold on to health.' I didn't know before, else I would not have been so careless--so wicked. I see now that it was all my own fault. I should not have been sick if I had taken care of myself--if I had held on to my health as you tried so hard to make me do." "Yes, dear, you had to have a hard lesson because you had always had such splendid health that you didn't know what it would mean to lose it." "Yes," Olga agreed, "I didn't believe that I could get sick--I was so strong. And down in my heart I really half believed that people need not be sick--that it was mostly imagination. I shall not be so uncharitable after this." "Girls need not be sick many times when they are," Laura said, "if they would be more careful and reasonable."