Of Garden Creek, Fredericton, New Brunswick, Canada.

Whitchurch Baptism Register:
  "1841 May 8   POWYS   William Cunliffe, born Mar. 13, s. Henry Philip, Esq & Phillippa Emma of Hardwick House"

Martin P-L writes:
Captain in 22nd Foot.
1866 married Constance Ellen Powys, daughter of Bransby.  Of these 11 brothers and sisters, he alone (with the help of Constance) produced any Powys children.
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In 1871 he and Constance had had three children:

First name(s)  Last name  Relationship  Marital status  Sex  Age  Birth year  Occupation  Birth place
William C    Powys    Head      -  Male    30  1841  -  xfordshire, England
Constance E  Powys    Wife      -  Female  33  1838  -  London, Middlesex, England
Percy C      Powys    Son       -  Male     3  1868  -  Warwickshire, England
Eleanor C    Powys    Daughter  -  Female   2  1869  -  Staffordshire, England
Mabel A      Powys    Daughter  -  Female   0  1871  -  Ireland
Frances M    Powys    Sister    -  Female  41  1830  -  Middlesex, England
Margaret     Hickson  Servant   -  Female  24  1847  -  Isle of Wight, Hampshire, England
Anne         Buckley  Servant   -  Female  24  1847  -  Ireland
Margaret     Birch    Servant   -  Female  15  1856  -  Kent

Ref:
Archive reference  RG10
Piece number       998
Folio              50
Page               26
Combined:          RG10, piece 998, folio 50, p. 26
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He and his family are in the 1881 Canadian census:

Extract: 1881 Canadian Census
Census Place: Kingsclear, York, New Brunswick
Source: FHL Film 1375817  NAC C-13181  Dist 30  SubDist H  Page 74  Family 292
Household:
                 Sex     Marr Age  Origin    Birthplace     Occ               Religion
Conlife POWYS    Male     M   40   English   England        Farmer      Church of England
Constance POWYS  Female   M   42   English   England                    Church of England
Percey POWYS     Male         13   English   England                    Church of England
Helener POWYS    Female       11   English   England                    Church of England
Mabel POWYS      Female       10   English   England                    Church of England
Ethel POWYS      Female        8   English   England                    Church of England
Florence POWYS   Female        7   English   England                    Church of England
John POWYS       Male         <1   English   New Brunswick              Church of England  Born: Jan; 3/12
Bridget FEENY    Female       45   Irish     Ireland        Servant     Catholic
George POWYS     Male         43   English   England        Navel R.N.  Church of England
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I have received from Frances Macneil, his great-grand-daughter, a copy of a death announcement in a paper:

MONDAY, OCTOBER 20, 1890
POWYS-At Garden Creek, Kingsclear, on the 18th inst., William Cunliffe Powys, Captain, late of H. M. 22nd regiment, aged 49 years.

A small photo accompanied this.  I am hoping to get a copy of either an enlargement or of the original.
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From the London Gazette:

2 Mar 1860: “22nd Foot, ... Ensign William Cunliffe Powys to be Lieutenant, by purchase, vice Proctor. Dated 2nd March, 1860.”

12 Sep 1865: “22nd Foot, Lieutenant William Cunliffe Powys to be Captain, by purchase, vice Harry Houlton Palmer Vivian, who retires. Dated 12th September, 1865.”

19 Aug 1873: “NOTICE is hereby given, that the Partnership heretofore subsisting between us the undersigned, John Lilly and William Cunliffe Powys, as Engineers, Millwrights, aud Machine Makers, at Crawford-passage, Farringdon-road, in the county of Middlesex, and Brewhouse-yard, Saint Johnstreet, Clerkenwell, in the same county, under the style or firm of John Lilly and Company, was dissolved, by mutual consent, as from the 25th day of March last, by the retirement of the said William Cunliffe Powys from the said firm.
Dated this 14th day of August, 1873.
John Lilly.
Wm. Cunliffe Powys.”
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TNA at Kew has an entry for him on the Death Duty Register:

First name(s)                William Cirnliffe
Last name                    Powys
Death year                   1890
Residence                    Kingselear, NEW BRUNSWICK
Court                        Court Of Probate
Record set                   Index to Death Duty Registers 1796-1903
National Archives reference  IR27/499
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In the London Probate Index of 1912:

POWYS William Cunliffe of Kingsclear county York Province of New Brunswick died 18 October 1890 Probate by the Probate Court in the county of York in the province of New Brunswick to Constance Ellen Powys widow.  Effects £209 in England.  Sealed London 11 June.
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Their marriage index:

First name(s)     WILLIAM C
Last name         POWYS
Marriage quarter  4
Marriage year     1866
MarriageFinder    WILLIAM C POWYS married one of these people
                  Emma L Scheve, Constance E Powys
District          St. Giles
County            London
Country           England
Volume            1B
Page number       765
Record set        England & Wales Marriages 1837-2005
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The transcript of the image of the marriage register:

Year:             1866
Place:            The parish Church of St George, Bloomsbury, Middlesex
No:               17
Date              October four
                        Him                       Her
Names:            William Cunliffe Powys    Constance Ellen Powys
Ages:             Full age                  Full age
Condition:        Bachelor                  Spinster
Profession        Captain 22 Regt           -
Resdience         38 Russell Square         38 Russell Square
Father            Henry Philip Powys        Bransby William Powys
Father’s job      Esquire                   Esquire

Marriage method:  Licence
Celebrant         Thomas Powys, Off Min
Witnesses         Bransby Wm Powys, Millicent Powys
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