Suddenly, without warning, she held the girl tightly in her arms. Her breathing was quick, as of one moved by some sharp sensation of terror. When Hetty, in no little wonder, opened her eyes Sara's face was turned away, and she was looking over her shoulder as if cause for alarm had come from behind.
"What is it?" cried Hetty anxiously.
She saw the look of dread in her companion's eyes, even as it began to fade.
"I don't know," muttered Sara. "Something, I can't tell what, came over me. I thought some one was stealing up behind me. How silly of me."
"Ah," said Hetty, with an odd smile, "I can understand how you felt."
"Hetty, will you take me in with you to-night?" whispered Sara nervously. "Let me sleep with you. I can't explain it, but I am afraid to be alone to-night." The girl's answer was a glad smile of acquiescence. "Come with me, then, to my bedroom while I change. I have the queerest feeling that some one is in my room. I don't want to be alone. Are you afraid?"
Hetty held back, her face blanching.
"No, I am not afraid," she cried at once, and started toward the door.
"There IS some one in this room," said Sara a few moments later, when they were in the big bedroom down the hall.
"I—I wonder," murmured Hetty.