Sir Leicester’s gallantry concedes the point, though he still feels that to bring this sort of squalor among the upper classes is really—really— "I was about to say," resumes the lawyer with undisturbed calmness, "that whether he had died by his own hand or not, it was beyond my power to tell you.
There are no more uses of "squalor" in the book.
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To meet her today, you would never guess she lived in squalor as a child.
Inside in that squalor? Why, I’ll just bet you anything that place is acrawl with black widows.