Sybil is listed twice in the 1901 census, but with diffrent birth years
In the 1901 census of Canada Chambly and Vercheres, Saint-Lambert, Quebec
Head John P. Sudbury, born April 23 1852, England, age 48, immigrated 1882, insurance agent
Wife Catherine Sudbury, born December 2 1858, England, age 42, immigrated 1882
Son Wilfred J. Sudbury born April 19 1883, Quebec Province, age 17
Daughter Mildred Sudbury, born November 9 1894, Quebec Province, age 6
Daughter Sybil Sudbury, born January 10 1892, Quebec Province, age 9
and
In the 1901 census of Canada Burrard, Vancouver, British Columbia
Head Charles S. Binns, born October 27 1868, england, age 32, immigrated 1889, puser on Empress of China,
Wife Kathleen Binns, born October 10 1877, England, age 23, immigrated 1883
Sister in Law Sybil Sudbury, born January 10 1893, Quebec, age 8

Vancouver Daily World, July 28 1919
Engagements
The engagement is announced of Mr. Dare Robertson Alexander of Hornsea, East Yorkshire England and Miss Sybil Sudbury, daughter of the late James T [should be P.] Sudbury and Mrs. Sudbury of Vancouver. Miss Sudbury leaves for England by August where the marriage will take place immediately on her arrival.

In the July to September 1919 marriage index Mary S. Sudbury and Dare R. Alexander, Skirlaugh district, East Yorkshire, volume 9d, page 901

British Columbia Death Index
Mary Sybil Alexander, died May 29 1966, age 73, Vancouver

of Hornsby, East Yorkshire

In the 1901 census 19 Marlborough Avenue, Cottingham, Sculcoates, Kingston upon Hull, Yorkshire
Head George Alexander, age 59, retired mechanical engineer, born Dundee, Scotland
Wife Lena Alexander, age 53, born Southampton, Hampshire
Son Robert Alexander, age 16, born Hull, Yorkshire
Daughter N. C. Alexander, single, age 24, born Calcutta, India
Daughter Nellie Alexander, single, age 18, born Seebpore, India
Son Dare Alexander, age 14, born Calcutta, India
Son Bertie Alexander, age 12, born Hull, Yorkshire
Visitor Lenora H. Smith, single, age 20, born Seebpore, India
1 housemaid and 1 cook

In the 1911 census of Canada 841 Georgia, Vancouver, British Columbia [Seems to be a hotel or large boarding house, as there are many boarders, some waitresses and chambermaids,. A total of 45 people]
Boarder Dare R. Alexander, single, born October 1887, India, immigrated 1910, Scotish origin, Canadian Nationality, Anglican, architect,

Canadian WWI Military Records
D. R. Alexander [later signs as Dare R. Alexander], Regimental Number 75072, A company, 29th Battalion, Private
Born Howrah, Calcutta, India, October 25 1887
Next of Kin: Angelina I. Alexander, Eastleigh, Hornsey, East Yorkshire, England
Trade, draughtsman
served in any military force? Cadet Corps, Hymers College, Hull
married: no
Oath taken November 7, 1914
Place of Enlistment, Vancouver
His pay is assigned to Miss Sudbury, 3632 - 3rd Avenue W., Vancouver, B.C.
May 20 1915 Embarked to England of RMS Missambie
September 18, 1915 Transferred to Base Details, Otterpool Camp
October 10 1915 Taken on strenght 48th Battalion, Shorncliffe
October 16 1915 Commission New [Imperial] Army, struck off strength, character very good
Thus his Canadian Records end

Canadian Ocean Arrival, Form 30A
September 9, 1923
Dare Alexander Robertson, age 36
Married, wife Mary Sybil Alexander
Present occupation, poultry farmer, intended occupation same
Born Howrah, Calcutta, race Scotch
Citizenship British, Religion Church of England
Going to Canada to settle
Intend to remain permanently
Previous address 1078 Harwood Street, Vancouver
Port of Previous entry, Montreal August 1910
Departure from Canada Montreal May 1915
Why did you leave Canadian Expeditionary Force
Money in Possession 500 pounds
Destined to 1078 Harwood Street, Vancouver British Columbia
Nearest relative in country from which you came, Brother R. M. Alexander, 83 Elm Park Mansions, Park Walk, Chelsea

British Columbia, Canada Death Index
Dare Robertson Alexander, died Jun 5 1968, Vancouver, age 81