Extract from the 1860 Census:
Name: Gilman Higdon
Age in 1860: 3
Estimated birth year: 1857
Birthplace: Illinois
Race: white
Sex: male
Relation to head-of-house: son
Home in 1860: Elmwood, Peoria, Illinois
Post office: Elmwood
Occupation: not listed
Siblings living at home: William (age 5) and Eliza (1)
Census place: Elmwood, Peoria, Illinois; Roll M653_217; Page: 548; Image: 178; Family History Library Film: 803217
Date: 20 Jul 1860

Extract from the 1870 Census:
Name: Gilman H Higdon
Age in 1870: 13
Birthplace: Illinois
Race: white
Gender: male
Home in 1870: Patton, Ford, Illinois
Post office: Paxton
Occupation: attending school
Siblings living at home: Wm J (age 15), Eliza E (11), Benjamin (9), Ulysses G (6), Celia (4), and Marietta (2/12)
Census place: Patton, Ford, Illinois; Roll: M593_221; Page: 69; Image: 139
Date: 28 Jun 1870

Extract from the 1880 Census:
Name: Gilman H Higdon
Age: 23
Estimated birth year: 1857
Birthplace: Illinois
Race: white
Sex: male
Relationship to head-of-household: boarder
Home in 1880: New Castle, Henry, Indiana
Marital status: single
Father's birthplace: Ohio
Mother's birthplace: Indiana [sic]
Occupation: baker
Census place: New Castle, Henry, Indiana; Roll: T9_284; Family History Film: 1254284; Page: 165.4000; Enumeration District: 10; Image: 0333
Date: 11 Jun 1880

Extract from the 1900 Census:
Name: Howard G Higdon
Age at last birthday: 44
Date of birth: Feb 1856 [sic]
Birthplace: Illinois
Race: white
Sex: male
Relationship to head-of-house: head
Home in 1900: Henry, Henry, Indiana
Address: North Court Street
Marital status: married
Number of years of marriage: 19
Able to read, write and speak English: yes
Father's birthplace: Ohio
Mother's birthplace: Indiana [sic]
Farm or home: home
Home owned or rented: owned
Mortgage: yes
Occupation: baker
Months not employed: 0
Census place: Henry, Henry, Indiana; Roll: T623 377; Page: 2A; Enumeration District: 66
Date: 1 Jun 1900

He married Emma Ruth Martindale 20 Apr 1881 in Henry County, Indiana.