Hi casalguidi,
You said in your first reply that, "There is indeed a Charles NEALE patient resident [at Camberwell House] ... at the time of the 1891 census. I didn't make a note of the page number but found him by scrolling through - RG12/472 folios 159-170."
I finally got to a library and found the folio pages you refered to above, but could not find a Charles NEALE. I note that several dozen patients were listed only by their initials, but none matched Charles Neale either.
Any chance you could direct me further? My apologies for being obtuse.
Spades