Extract from the 1880 Census:
Name: Francis Heacox
Age: 7
Estimated birth year: 1873
Birthplace: Illinois
Race: white
Sex: male
Relationship to head-of-household: son
Home in 1880: Nettle Creek, Grundy, Illinois
Marital status: single
Father's birthplace: New York
Mother's birthplace: Illinois
Occupation: attending school
Siblings living at home: Edwin (age 11), Lily (9), Clara (5), and Frederick (3)
Census place: Nettle Creek, Grundy, Illinois; Roll: T9_209; Family History Film: 1254209; Page: 279.4000; Enumeration District: 4; Image: 0563
Date: 8 Jun 1880

Extract from the 1900 Census:
Name: Francis E Heacox
Age at last birthday: 27
Date of birth: Apr 1873
Birthplace: Illinois
Race: white
Sex: male
Relationship to head-of-house: boarder
Living with: Robinson and Nancy Barr, ages 61 and 55
Home in 1900: Britt, Hancock, Iowa
Marital status: single
Able to read, write and speak English: yes
Father's birthplace: New York
Mother's birthplace: Illinois
Farm or home: home
Occupation: dentist
Months not employed: 0
Census place: Britt, Hancock, Iowa; Roll: T623 434; Page: 3A; Enumeration District: 119
Date: 2 Jun 1900

Extract from the 1910 Census:
Name: Francis E Heacox
Age in 1910: 36
Estimated birth year: 1874
Birthplace: Illinois
Race: white
Sex: male
Relationship to head of family: head
Home in 1910: Britt Township, Hancock, Iowa
Address: Second Street
Marital status: married
Number of years of present marriage: 5
Able to speak English: yes
Able to read and write: yes
Father's birthplace: Illinois [sic]
Mother's birthplace: Illinois
Farm or house: house
Home owned or rented: rented
Occupation: dentist
Salary or wage worker: working on own account
Census place: Britt, Hancock, Iowa; Roll: T624_393; Page: 4B; Enumeration District: 130; Image: 319
Date: 19 Apr 1910

Extract from "History of Grundy County, Illinois," 1914, page 891:
Reardon, William Hendly
On March 19, 1899, Mr. Reardon was married to Clara Heacox, born in Nettle Creek Township, a daughter of Charles and Harriet Adeline (David) Heacox, natives of New York and Nettle Creek Township, respectively. Mrs. Reardon was one of the following family: Edward, who lives at Huron, S. D.; Lilly, who is Mrs. Edward Strong of Mazon, Ill.; Frank; who is a dentist of Britt, Iowa; Mrs. Reardon; Fred, who is of Morris; and Rose, who is Mrs. T. L. Robinson of Chicago.

Extract from the 1920 Census:
Name: Francis E Heacox
Age: 46
Estimated birth year: 1874
Birthplace: Illinois
Race: white
Sex: male
Home in 1920: Britt, Hancock, Iowa
Address: Second Street
Marital status: married
Able to speak English: yes
Able to read and write: yes
Father's birthplace: New York
Mother's birthplace: Illinois
Home owned or rented: owned; no mortgage
Occupation: doctor
Type of industry: dentistry
Salary or wage worker: wages
Census place: Britt, Hancock, Iowa; Roll: T625_492; Page: 13B; Enumeration District: 143; Image: 114
Date: 13 Jan 1920

Extract from the 1930 Census:
Name: Francis E Heacox
Age: 56
Estimated birth year: 1874
Birthplace: Illinois
Race: white
Sex: male
Relation to head-of-house: head
Home in 1930: Britt, Hancock, Iowa
Marital status: married
Age at first marriage: 31
Education: able to speak English
Education: able to read and write
Father's birthplace: New York
Mother's birthplace: Illinois
Military service: no
Rent/home value: owns home; value $4000
Owns a radio: yes
Occupation: doctor
Industry: dentistry
Salary or wage worker: working on own account
Census place: Britt, Hancock, Iowa; Roll: 657; Page: ; Enumeration District: 9; Image: 705.0
Date: 17 Apr 1930

Extract from the 1940 Census:
Name: Heacox
Age: 66
Estimated birth year: 1874
Birthplace: Illinois
Race: white
Sex: male
Relation to head-of-house: head
Home in 1940: Britt, Hancock, Iowa
Address: 255 3rd Street
Marital status: married
Highest grade of school completed: college 3 years
Living on farm: no
Home owned or rented: owned
Value of home: $2800
Place of residence in 1935: same house
Occupation: dentist
Industry: private office
Salary or wage worker: working on own account
Number of weeks worked in 1939: 0 [sic]
Amount of money wages or salary: $0
Has other income of more than $50: yes
At work during week of March 24-30: yes
Number of hours worked: 48
Census place: Britt, Hancock, Iowa; Roll: T627_1164; Page: 8A; Enumeration District: 41-9
Date: 2 Apr 1940

Extract from the 1950 Census:
Name: Francis E Heacox
Age: 76
Estimated birth year: 1874
Birthplace: Illinois
Race: white
Sex: male
Relation to head-of-house: head
Home in 1950: Britt, Hancock, Iowa
Address: 255 East 2nd Street
Marital status: married
Living on farm: no
Occupation: dentist
Industry: dentistry
At work during last week: yes
Number of hours worked: 45
Class of worker: own business
Census place: Britt, Hancock, Iowa
Date: 13 Apr 1950
Extract from the 1950 Census:
Name: Francis E Heacox
Age: 76
Estimated birth year: 1874
Birthplace: Illinois
Race: white
Sex: male
Relation to head-of-house: head
Home in 1950: Britt, Hancock, Iowa
Address: 255 East 2nd Street
Marital status: married
Living on farm: no
Occupation: dentist
Industry: dentistry
At work during last week: yes
Number of hours worked: 45
Class of worker: own business
Census place: Britt, Hancock, Iowa
Date: 13 Apr 1950

Extract from the 1950 Census:
Name: Francis E Heacox
Age: 76
Estimated birth year: 1874
Birthplace: Illinois
Race: white
Sex: male
Relation to head-of-house: head
Home in 1950: Britt, Hancock, Iowa
Address: 255 East 2nd Street
Marital status: married
Living on farm: no
Occupation: dentist
Industry: dentistry
At work during last week: yes
Number of hours worked: 45
Class of worker: own business
Census place: Britt, Hancock, Iowa
Date: 13 Apr 1950

Extract from Iowa Death Certificate:
Name: Francis Eugene Heacox
Age at death: 87
Birth date: 25 Apr 1873
Birth place: Britt, Hancock, Iowa
Gender: male
Race: white
Marital status: married
Residence: 255 East 2nd, Britt, Hancock, Iowa
Father: Charles Heacox
Mother: Harriet David
Occupation: dentist
Social Security number: 481-46-8649
Military service: none
Death date: 8 Feb 1961
Death place: at home in Britt, Hancock, Iowa
Cause of death: coronary thrombosis
Contributing causes: arteriosclerotic heart disease
Burial, cremation, removal: burial
Cemetery: Evergreen Cemetery
Location of cemetery: Britt, Iowa
Informant: Mrs F E Heacox, Brfitt, Iowa
Certificate date: 16 Feb 1961
Certificate number: 61-02933

He was known as "Doc" Heacox, and was a beloved dentist in Britt, Iowa, near the Minnesota border. He was very active in the Boy Scouts, and his motto was "a good man dies when a boy goes wrong." He died at age 87.

Obituary, probably from the "News-Tribune" of Britt, Iowa dated Thursday, 16 Feb 1961:
Rites Held for Dr. F. E. Heacox, Retired Dentist
Practiced in Britt 52 Years; Worked with Boys and Community
Funeral services were conducted Monday afternoon [13 Feb 1961] here in the Methodist Church for Dr. F. E. Heacox, a highly respected, retired Britt dentist who died unexpectedly last Wednesday at his home here. The services were in charge of the Rev. Warren S. Paige and interment was in Evergreen Cemetery.
"Doc," as he was known to everyone, practiced dentistry in Britt for over 50 years, retiring in 1951. He had maintained his office in the same location during his entire working years. During this time he was also an outstanding layman and worker in the Methodist church and retired from this the same year. One of his outstanding qualities was his ability to work with young boys and men giving them counseling and guidance. A sign which always hung in his office will be remembered by many, "A good man dies when a boy goes wrong."
He had been a wheel chair patient for some time as the result of a broken hip suffered a few years ago but this did not mar his kind and genial nature.
Francis Eugene Heacox, son of Charles Edwin and Harriet Adelaide, was born at Morris, Ill., April 25, 1873. he was educated in the rural schools in Sugar Grove, Ill. For two or three years after graduating from high school he taught country schools in the vicinity of Morris.
In 1895, he entered Northwestern University Dental School in Chicago. He graduated in 1898 and during vacation periods assisted dentists in Iron Wood, Michigan and New London, Wisconsin. In Oct. of '98, he came to Britt, Ia., to assist in the dental office of Dr. Flagg, and a short time later purchased the practice. Dr. Heacox maintained his dental practice in Britt for 52 years.
June 15, 1904 he was married to Mattie Bailey. To this union three children were born: Edwin, Tacoma, Washington; Maynard, Hammond, Indiana, and Martha (Mrs. Glen Bergan), Williams, Minnesota.
Dr. Heacox was a life member of the American Dental Association; a life member of Darius Lodge No. 431, A. F. & A. M., and a life member of the Order of the Eastern Star. He was a member of the Methodist church and served it faithfully throughout his entire life. His greatest work was with boys and he taught a boys Sunday School class for a great many years.
Besides his wife and children he is survived by one sister, Rosabel Robinson, Long Beach, California; 11 grandchildren, and a host of friends.

He married Martha Adeline Bailey 15 Jun 1904 in Britt, Hancock, Iowa.