As for the momentary madness which had fallen upon him on the eve of his...

As for the momentary madness which had fallen upon him on the eve of his marriage, he had trained himself to regard it as the last of his discarded experiments. The idea that he could ever, in his senses, have dreamed of marrying the Countess Olenska had become almost unthinkable, and she remained in his memory simply as the most plaintive and poignant of a line of ghosts.
But all these abstractions and eliminations made of his mind a rather empty and echoing place, and he supposed that was one of the reasons why the busy animated people on the Beaufort lawn shocked him as if they had been children playing in a grave-yard.