"And I oughtn't--right on such a big supper." "I don't see how I can sleep, and I know I can't stay awake," rejoined Helen.
Dale lifted his head alertly.
"Listen." The girls grew tense and still.

Helen could not hear a sound, unless it was a low thud of hoof out in the gloom.

The forest seemed sleeping.

She knew from Bo's eyes, wide and shining in the camp-fire light, that she, too, had failed to catch whatever it was Dale meant.
"Bunch of coyotes comin'," he explained.
Suddenly the quietness split to a chorus of snappy, high-strung, strange barks.

They sounded wild, yet they held something of a friendly or inquisitive note.