It is hardly necessary to add that beyond all doubt he would have presented himself at Mr Casby's door, if there had been no Little Dorrit in existence; for we all know how we all deceive ourselves--that is to say, how people in general, our profounder selves excepted, deceive themselves--as to motives of action.
With a comfortable impression upon him, and quite an honest one in its way, that he was still patronising Little Dorrit in doing what had no reference to her, he found himself one afternoon at the corner of Mr Casby's street.

Mr Casby lived in a street in the Gray's Inn Road, which had set off from that thoroughfare with the intention of running at one heat down into the valley, and up again to the top of Pentonville Hill; but which had run itself out of breath in twenty yards, and had stood still ever since.

There is no such place in that part now; but it remained there for many years, looking with a baulked countenance at the wilderness patched with unfruitful gardens and pimpled with eruptive summerhouses, that it had meant to run over in no time.
'The house,' thought Clennam, as he crossed to the door, 'is as little changed as my mother's, and looks almost as gloomy.

But the likeness ends outside.

I know its staid repose within.