*1870 U.S. Federal Census; State: Illinois; County: Cook; Town: Chicago; Ward: 3; Post Office: Chicago; Page: 343; Enumeration date: 3 "Aug 1870; Enumerator: Wm. Jameson, Ass't Marshal ; Series M593, Microfilm Roll Number 199; Page: 435; Transcribed by Joyce Nelle Ratliff; 20 Mar 2004; Line: 9; Dwelling house number: 1885; Family number: 3632; Name: Lucius B. Boomer; Age last birthday: 44; Sex: Male; Color: white; Profession or occupation: Bridge Builder; Value of real estate owned: $200,000; Value of personal estate: $150,000; Place of birth: Massachusetts; Male citizen 21 years and up: yes. (*Lucius B Boomer had several other persons living in the household besides his family. 2 children with no obvious parents, 3 female servants; 1 Laundress; and 1 Hostler.)

*1880 U.S. Federal Census; State: Illinois; County: Cook; Town: Chicago; Family History Library Film: 1254186; NA Film Number: T9-0186; Page number: 56C; www.familysearch; Transcribed by Joyce Nelle Ratliff, 21 Mar 2004; Name: Lucius B. Boomer; Relation to head of family: Other; Marital status: Nothing listed; Gender: male; Race: white; Age: 54; Birthplace: Massachusetts; Father's birthplace: Massachusetts; Mother's birthplace: Massachusetts. (*Lucius B. Boomer is living with the Henry E. Gilbert family)

1870 U.S. Federal Census; State: Illinois; County: Cook; Town: Chicago; Ward: 3; Post Office: Chicago; Page: 343; Enumeration date: 3 "Aug 1870; Enumerator: Wm. Jameson, Ass't Marshal ; Series M593, Microfilm Roll Number 199; Page: 435; Transcribed by Joyce Nelle Ratliff; 20 Mar 2004; Line: 10; Name: Anna Boomer; Age last birthday: 41; Sex: female; Color: white; Profession or occupation: Keeping house; Place of birth: Connecticut.

1870 U.S. Federal Census; State: Illinois; County: Cook; Town: Chicago; Ward: 3; Post Office: Chicago; Page: 343; Enumeration date: 3 "Aug 1870; Enumerator: Wm. Jameson, Ass't Marshal ; Series M593, Microfilm Roll Number 199; Page: 435; Transcribed by Joyce Nelle Ratliff; 20 Mar 2004; Line: 12; Name: William Boomer; Age last birthday: 12; Color: white; Occupation: Attending school; Place of birth: Illinois; Attended school within the year: yes.

*1880 U.S. Federal Census; State: Illinois; County: Cook; Town: Chicago; Family History Library Film: 1254186; NA Film Number: T9-0186; Page number: 60D; www.familysearch.org; Transcribed by Joyce Nelle Ratliff, 21 Mar 2004; Name: Wm. Boomer; Relation to head of family: *son; Marital status: Single; Gender: Male; Race: white; Age: 22; Birthplace: Illinois; Occupation: student; Father's Birthplace: Massachusetts; Mother's Birthplace: Connecticut. (*Although it says that Wm. Boomer is the son of Levi Backus, I believe Wm. Boomer is the son of Lucius Boomer)

1870 U.S. Federal Census; State: Illinois; County: Cook; Town: Chicago; Ward: 3; Post Office: Chicago; Page: 343; Enumeration date: 3 "Aug 1870; Enumerator: Wm. Jameson, Ass't Marshal ; Series M593, Microfilm Roll Number 199; Page: 435; Transcribed by Joyce Nelle Ratliff; 20 Mar 2004; Line: 13; Name: Mary Mc Boomer; Age last birthday: 9; Sex: female; Color: white; Occupation: Nothing listed; Place of birth: Illinois; Attended school within the year. Yes.

*1880 U.S. Federal Census; State: Illinois; County: Cook; Town: Chicago; Family History Library Film: 1254186; NA Film Number: T9-0186; Page number: 56C; www.familysearch; Transcribed by Joyce Nelle Ratliff, 21 Mar 2004; Name: Mary Mc C. Boomer; Relation to head of family: Other; Marital Status: single; Gender: female; Race: white; Age: 19; Birthplace: Illinois; Occupation: None listed; Father's Birthplace: Massachusetts; Mother's Birthplace: Massachusetts. (*Mary Mc C. Boomer and her father are living with the Henry E. Gilbert family.)