CHAMBERLAIN/MORGAN (General)
Looking at an old message of Rootsweb - re the biography of Neville BOWES CHAMBERLAIN (son of Henry and Anne - and is on the 1881 census at 4 Seamore Place, Curzon St. London)
N.B. CHAMBERLAIN - Visitor, Male - 61 - born Brazil, General Indian Army
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As much information you have does help - how far have got confirmed research?
Sir Henry Chamberlain's - second wife - Anne Eugenia MORGAN (daughter of William, 5 June 1813)
Wikipedia: (doesn't say where the marriage was, but is on Ancestry
http://www.en.wikipedia.org/wiki/Sir_Henry_Chamberlain,_1st_Baronet
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Marriage at St George Bloomsbury, Middlesex, 5 June 1813 (by licence) ? do you have copy of the Licence, which would give more info
Henry CHAMBERLAIN Esquire of the Parish of St James Westminster and Anne Eugenia MORGAN of this Parish a Spinster
Witnesses: William MORGAN Jnr, Henry CHAMBERLAIN, Jnr
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Looking at Public Members' trees - various places of birth for Anne Eugenia MORGAN
Rootsweb: Ann's father, was William MORGAN, Merchant of London
and also her parents ???
Marriage at Southwark St Mary Newington - 31 August 1783
William MORGAN of this Parish Batchelor and Mary Catherine BOCKMAN of this Parish, Spinster, married by Licence
witnesses: Gashard ? BOCKMAN and John MORGAN