Sense became vague to Helen.

She lost the low murmur of the waterfall, and then the sound or feeling of some one at the campfire.

And her last conscious thought was that she tried to open her eyes and could not.
When she awoke all was bright.

The sun shone almost directly overhead.
Helen was astounded.

Bo lay wrapped in deep sleep, her face flushed, with beads of perspiration on her brow and the chestnut curls damp.
Helen threw down the blankets, and then, gathering courage--for she felt as if her back was broken--she endeavored to sit up.