Extract from the 1900 Census:
Name: Leonard Lambert
Age at last birthday: 15
Date of birth: Jul 1884
Birthplace: Minnesota
Race: white
Sex: male
Relationship to head-of-house: son
Home in 1900: Fergus Falls, Otter Tail, Minnesota
Address: Adolphus Avenue
Marital status: single
Able to read, write and speak English: yes
Father's birthplace: New York
Mother's birthplace: Ohio
Occupation: attending school
Siblings living at home: Blaine (age 13), Lizzie (8), Asa C (6), and Ira R (6)
Census place: Fergus Falls, Otter Tail, Minnesota; Roll: T623 779; Page: 22B; Enumeration District: 169
Date: 21 Jun 1900

Extract from the 1910 Census:
Name: Leonard E Lambert
Age in 1910: 25
Estimated birth year: 1885
Birthplace: Minnesota
Race: white
Sex: male
Relation to head of house: lodger
Home in 1910: Coleraine, Itasca, Minnesota
Address: Roosevelt Ave
Marital status: single
Able to speak English: yes
Able to read and write: yes
Father's birthplace: New York
Mother's birthplace: Ohio
Occupation: engineer
Type of industry: civil
Salary or wage worker: wages
Whether out of work on April 15, 1910: no
Number of weeks out of work in 1909: 0
Census place: Coleraine, Itasca, Minnesota; Roll: T624_707; Page: 17B; Enumeration District: 63; Image: 845
Date: 19 Apr 1910

Extract from World War I Draft Registration Cards, 1917-1918:
Name: Leonard Elijah Lambert
City: not stated
County: Watonwan
State: Minnesota
Birth date: 26 Jul 1884
Race: white
Roll: 1682695
Draft board: 0
Address: Madelia, Minnesota
Occupation: civil engineer
Employer: not listed
Where employed: Madelia, Minnesota
Nearest relative: E. S. Lambert
Address: Fergus Falls
Age: 34
Height: medium
Build: slender
Eyes: brown
Hair: black
Date: 12 Sep 1918

Extract from the 1920 Census:
Name: Leonard E Lambert
Age: 35
Estimated birth year: 1885
Birthplace: Minnesota
Race: white
Sex: male
Relationship to head of house: head
Home in 1920: Eveleth, Saint Louis, Minnesota
Address: 222 Douglas Avenue
Marital status: married
Able to speak English: yes
Able to read and write: yes
Father's birthplace: Minnesota [sic]
Mother's birthplace: Ohio
Home owned or rented: rented
Occupation: civil engineer
Type of industry: iron mine
Salary or wage worker: wages
Census place: Eveleth, Saint Louis, Minnesota; Roll: T625_861; Page: 8A; Enumeration District: 148; Image: 5
Date: 8 Jan 1920

Extract from the 1930 Census:
Name: Leonard Lambert
Age: 45
Estimated birth year: 1885
Birthplace: Minnesota
Race: white
Sex: male
Relation to head-of-house: head
Home in 1930: Fayal, Saint Louis, Minnesota
Marital status: married
Age at first marriage: 28
Education: able to speak English
Education: able to read and write
Father's birthplace: New York
Mother's birthplace: Indiana [sic]
Military service: no
Rent/home value: rents; $17
Owned a radio: yes
Occupation: engineer
Industry: iron mine
Salary or wage worker: wages
Census place: Fayal, Saint Louis, Minnesota; Roll: 1128; Page: ; Enumeration District: 99; Image: 17.0
Date: 18 Apr 1930

Extract from the 1940 Census:
Name: Leonard E Lambert
Age: 54
Estimated birth year: 1886
Birthplace: Minnesota
Race: white
Sex: male
Relation to head-of-house: head
Home in 1940: Eveleth, Saint Louis, Minnesota
Address: 517 Roosevelt Avenue
Marital status: married
Highest grade of school completed: high school 4 years
Living on farm: no
Home owned or rented: owned
Value of home: $1500
City of residence in 1935: Eveleth, Saint Louis, Minnesota
Resident on farm in 1935: no
Occupation: engineer
Industry: iron mine
Salary or wage worker: wages
Number of weeks worked in 1939: 52
Amount of money wages or salary: $2304
Has other income of more than $50: no
At work during week of March 24-30: yes
Number of hours worked: 42
Census place: Eveleth, Saint Louis, Minnesota; Roll: T627_1955; Page: 3B; Enumeration District: 69-44
Date: 4 Apr 1940

Extract from U.S. World War II Draft Registration Cards, 1942:
Name: Leonard E Lambert
Age: 57
Birth date: 26 Jul 1884
Birth place: Wadena, Minnesota
Race: white
Address: 517 Roosevelt Avenue, Eveleth, Saint Louis, Minnesota
Telephone: 627
Name of person who will always know your address: Mrs Laura B Lambert, 517 Roosevelt Avenue, Eveleth, Minnesota
Employer: O.I.M.Co. [Oliver Iron Mining Company]
Place of employment: office (mining engineer), Virginia, Saint Louis, Minnesota
Height: 5 feet 10 inches
Weight: 162
Eyes: brown
Hair: gray
Complexion: dark
Other characteristics: end of ring finger on left hand missing
Date: 27 Apr 1942

Extract from the 1950 Census:
Name: Leonard E Lambert
Age: 65
Estimated birth year: 1885
Birthplace: Minnesota
Race: white
Sex: male
Relation to head-of-house: head
Home in 1950: Virginia, Saint Louis, Minnesota
Address: 520 10th Street South
Marital status: married
Living on farm: no
Occupation: mining engineer
Industry: iron mine
At work during last week: yes
Number of hours worked: 40
Class of worker: for private employer
Census place: Virginia, Saint Louis, Minnesota
Date: 10 Apr 1950

Leonard Lambert was employed by Oliver Mining Company as a surveyor and draftsman for over 50 years. He retired 31 Dec 1963 at age 69 although the company retirement age was 65. He served in the Philippines in World War II. He died 30 Jul 1983 at age 99 in Minneapolis. He is buried in Virginia, Minnesota.

Death notice from the "Star Tribune" of Minneapolis, Minnesota dated 19 Aug 1983:
Deaths
Lambert, Leonard E., 99, 3701 Bryant Av. S.

He married (1) Elsie Leone Koke 1913 in Mankato, Blue Earth County, Minnesota.
He married (2) Laura F Berg 20 Oct 1919 in Duluth, Saint Louis, Minnesota.