was that,

whether she felt sad or angry, crushed with the sense of Anthony's indifference, or burning with impatience under Miss Assher's attentions, it was always a relief to her to sing. Those full deep notes she sent forth seemed to be lifting the pain from her heart—seemed to be carrying away the madness from her brain.

Thus Lady Cheverel noticed no change in Caterina, and it was only Mr. Gilfil who discerned with anxiety the feverish spot that sometimes rose on her cheek, the deepening violet tint under her eyes, and the strange absent glance, the unhealthy glitter of the beautiful eyes themselves. But those agitated nights were producing a more fatal effect than was represented by these slight outward changes.