That morning Concepcion had been invisible, but at his early breakfast he had received a note from her, a brief but masterly composition, if ever so slightly theatrical.  He was conscious of tenderness for Concepcion, of sympathy with her, of a desire to help to restore her to that which by misfortune she had lost.  But the first of these sentiments he resolutely put aside.  He was determined to change his mood towards her for the sake of his own tranquillity; and he had convinced himself that his wise, calm, common sense was capable of saving her from any tragic and fatal folly.  He had her in the hollow of his hand; but if she was expecting too much from him she would be gradually disappointed.  He must have peace; he could not allow a bomb to be thrown into his habits; he was a bachelor of over fifty whose habits had the value of inestimable jewels and whose perfect independence was the most precious thing in the world.  At his age he could not marry a volcano, a revolution, a new radio-active element exhibiting properties which were an enigma to social science.  Concepcion would turn his existence into an endless drama of which she alone, with her deep-rooted, devilish talent for the sensational, would always choose the setting, as she had chosen the window and the weir.  No; he must not mistake affectionate sympathy for tenderness, nor tolerate the sexual exploitation of his pity.

As he listened and talked to the acquaintance his inner mind shifted with relief to the vision of Christine, contented and simple and compliant in her nest—­Christine, at once restful and exciting, Christine, the exquisite symbol of acquiescence and response.  What a contrast to Concepcion!  It had been a bold and sudden stroke to lift Christine to another plane, but a stroke well justified and entirely successful, fulfilling his dream.

At this moment he noticed a figure pass the doorway in whose shadow he was, and he exclaimed within himself incredulously: 

“That is Christine!”

In the shortest possible delay he said “Good-night” to his acquaintance, and jumped down the steps and followed eastwards the figure.  He followed warily, for already the strange and distressing idea had occurred to him that he must not overtake her—­if she it was.  It was she.  He caught sight of her again in the thick obscurity by the prison-wall of Devonshire House.  He recognised the peculiar brim of the new hat and the new “military” umbrella held on the wrist by a thong.

What was she doing abroad?  She could not be going to a theatre.  She had not a friend in London.  He was her London.  And la mere Gaston was not with her.  Theoretically, of course, she was free.  He had laid down no law.  But it had been clearly understood between them that she should never emerge at night alone.  She herself had promulgated the rule, for she had a sense of propriety and a strong sense of reality.  She had belonged to the class which respectable, broadminded women, when they bantered G.J., always called “the pretty ladies,” and as a postulant for respectability she had for her own satisfaction to mind her p’s and q’s.  She could not afford not to keep herself above suspicion.