It was the first time he had seen her even smile other than bitterly.

Characteristically unconscious of any humor in her error, he remained unembarrassed.

But he could not help noticing a change in the expression of her face, her voice, and even her intonation.

It seemed as if that fit of laughter had loosed the last ties that bound her to a self-imposed character, had swept away the last barrier between her and her healthier nature, had dispossessed a painful unreality, and relieved the morbid tension of a purely nervous attitude.

The change in her utterance and the resumption of her softer Spanish accent seemed to have come with her confidences, and Low took leave of her before their sylvan cabin with a comrade's heartiness, and a complete forgetfulness that her voice had ever irritated him.
When he returned that afternoon he was startled to find the cabin empty.