I'm still looking for both Henrys, Chambers and Sandall.
I just wanted to be sure you saw the George Sanders on the manifest, because it looked like Augusta's husband to me.
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re Henry Chambers, have you found him in 1870? They should have their oldest daughter Annie with them. His occupation might help identify him.
Other than that, if there aren't any other Henry Chambers in the area, then he is probably son of Henry (b 1814) and Elizabeth. To many Americans all of England is London, and all of Canada is either Toronto or Montreal, all of New York State is New York City, etc. So I wouldn't worry much about his birthplace on a death record or a tombstone - I don't know where you found "London" - I did see it at findagrave.