The Wheel of Life by Ellen Glasgow

So far as Connie was concerned the trip South had been, to all outward appearance at least, entirely successful. Adams had watched her bloom back into something of her girlish prettiness, and day by day, in the quiet little Florida village to which they had gone, the lines of nervous exhaustion had faded slowly from her face. For the first two weeks she had been content to lie motionless in the balmy air beneath the pines, while she had yielded herself to the silence with a resignation almost pathetic in its childish helplessness. But with her returning vigour the old ache for excitement awoke within her, and to stifle her craving for the drug which Adams had denied her, she had turned at last to the immoderate use of wine. So, hopelessly but with unfailing courage, he had brought her again to New York where he had placed her in the charge of a specialist in obscure diseases of the nerves.

Except for the hours which he spent in his office, he hardly left her side for a minute day or night, and the strain of the close watching, the sleepless responsibility, had produced in him that quivering sensitiveness which made his self-control a bodily as well as a mental effort. Yet through it all he had never relaxed in the fervour of his compassion -- had never paused even to question if the battle were not useless -- if Connie herself were worth the sacrifice -- until, almost to his surprise, there had come at last a result which, in the beginning, he had neither expected nor desired.