Have you looked at TNA, The National Archives, for records of Chelsea Pensioners (out)? It
seems there were agents who paid them their pensions wherever they lived. It may give a
clue or two.
Also this link to Chelsea Pensioners website.
There was no Manning in their book of remembrance.
the link to the British Empire website and the 14th Dragoons made for great reading of
'derring-do' and raised a deal of chuckles. A must read. Repeated here:
Luned in Blaenavon
Charles MANNING was living in Wolverhampton in 1851 - he was a Chelsea
(out) Pensioner. Their son was born in King's Lynn, Norfolk in 1820
because father happened to be there with the army at the time. This is
my problem, I have no idea where they might have been at the time they
married. A further complication is that Mary died in 1838 so I have no
way of knowing where she was born.