Robert Argyle Chamberlain was born in 1891, according to his WWI Draft Registration, in 1892 according to his VA records, and 1893 according to the California Death Index.

1910 United States Census
Duluth, St Louis, Minnesota
Kate Chamberlin Widow 52 Canada English 1870 Immigration mother of 7 all living, Owner House no mortgage
William B Chamberlin Son 32 Illinois Boat Captain
Katharine Chamberlin Daughter 19 Illinois Stenographer
Arguile Chamberlin Son 15 Illinois Office boy telephone company
Mary Chamberlin Daughter 12 Illinois
Harry Chamberlin Son 9 Illinois

United States World War I Draft Registration 9 June 1917
Robert A Chamberlain, born 30 August 1891, Chicago, Illinois; residing in Duluth, St Louis County, Minnesota, present occupation First Mate, D.7. Helm, Duluth, at Str Vulcan. Prior military service - Rank Quartermaster, branch Naval Reserve, years 8, Minnesota; supporting Mother

Minnesota, WWI Records
Robert Argyle Chamberlain
Birth 30 August 1892 Chicago, Cook, Illinois
Navy Training Station, Cleveland, Cuyahoga, Ohio
Enlistment 22 January 1918
Rank Lieutenant (jg)
Mother – Kate Chamberlain, birthplace Canada
Spouse – Blanche Elizabeth Chamberlain

WWI Service
Lt (jg) USNRF Robert Argyle Chamberlain, born 30 August 1892, enlisted March 13, 1918, discharged March 2, 1919.

1920 United States Census
San Francisco, San Francisco County, California
Robert A Chamberlain Lodger 27 Illinois, father born Wisconsin, mother born Canada, Seaman Ocean Stranus

Robert Argyle Chamberlain married Elizabeth Clark Doty in about 1921.

1930 United States Census
Beverly Hills, Los Angeles, California
Robert Chamberlain Head 37 age at marriage 28 Illinois Wisconsin Canada English Automobile Salesman
Beth C Chamberlain Wife 39 age at marriage 30 Illinois Indiana Indiana
Betty Lee Chamberlain Daughter 16 Illinois Illinois Illinois

California, Los Angeles County Death Records
Beth C Chamberlain
Birth 6 March 1890 Chicago, Illinois
Father Albert Charles Clark born Chicago, Illinois
Mother Prudence M Smith born Illinois
Spouse Robert A Chamberlain age 46
Death 16 March 1940 Beverly Hills, Los Angeles County, California
Burial Forest Lawn Cemetery

California, County Marriages, 1850-1952
Robert Argyle Chamberlain, 49, son of Samuel R Chamberlain and Kate McRay, occupation US Navy, and Anna Blackler Dunlap, 36, daughter of Harvey S Blackler and Laura Kelchner, occupation Secretary in Dental Office, were married June 2, 1943, Los Angeles, California

Hawaii, Honolulu Passenger Lists, Immigration
S.S. Lurline sailing from San Francisco arriving at Honolulu, T.H. [Territory of Hawaii] November 7, 1949
Robert Chamberlain, 55
Birth Chicago, Illinois
Anna Chamberlain, 43
Birth Colorado Springs, Colorado

California, County Birth and Death Records
Robert Argyle Chamberlain
Birth 30 August 1893 Illinois
Death 4 August 1953 Los Angeles, California
Burial 7 August 1953 Forest Lawn
Veteran World Wars I & II
Father Samuel Roberts Chamberlain born Wisconsin
Mother Catherine Mc Rae born Canada
Spouse Anna E Chamberlain