This was a solid, slightly fussy, slightly old-fashioned book about an essentially orphaned ex-pat, his extraordinary judicial life, and his "return" to England (where he had never actually lived for any period of time). the "Old filth" of the title is a reference to this character as well as (mataphorically) to some of the experiences of his past -- whether traumatic or just not English enough. The nearly century-long span of the novel's telling is carried off masterfully; the moving back and forth through time was seamless. That said, this is very much character-driven and not event-driven, and I could see folks being tired by the lack of narrative drive.