He is somewhat difficult to follow through the historic record due to changes in his name, birth year, birth place and wife's given name as noted in various documents. In the US Census of 1900 he was listed as William Barnham, born Jan 1858 in Missouri and married to Anna, in the US Census of 1910 he was listed as Augusta [sic] Barnum, born about 1859 in Arkansas and married to Louis A. [sic]; in the US Census of 1920 his wife was listed as Annie Barnum, born abt 1868 in Arkansas and widowed (her full given name was apparently Louisiana). In contemporary city directories he was listed with similar changes: in 1886 he was G. H. Barnum, living in Waco, Texas; in 1889 he was Augustus H. Barnum, living in Austin, Texas; from 1906 through 1915 he lived in Dallas, Texas, and listed himself variously as Augustus H. Barnum, Gustavus H. Barnum and Gus H. Barnum.
In the 1900 US Census for District 119, Justice Precinct 7, Tarrant County, Texas the family of William A. H. Barnum was enumerated as follows:
Dwelling 6; Family 6
Barnum, William; Head; W; M; b. Jan 1858; 41; Married 18 years; b. Missouri; Father b. New York; Mother b. Arkansas; Farm laborer; Can read, write and speak English; Rents non-farm home
Barnum, Anna; Wife; W; F; b. Dec 1868; 32; Married 18 years; Mother of 9 children; 8 children living; b. Louisiana; Both parents b. Louisiana; Can read, write and speak English
Barnum, John; Son; W; M; b. March 1882; 18; Single; b. Texas; Father b. Missouri; Mother b. Louisiana; Farm laborer; Can read, write and speak English
Barnum, L. Mary; Daughter; W; F; b. March 1881; 19; Single; b. Texas; Father b. Missouri; Mother b. Louisiana; Farm laborer; Can read, write and speak English
Barnum, George; Son; W; M; b. Jan 1889; 11; Single; b. Texas; Father b. Missouri; Mother b. Louisiana; Farm laborer; Can read, write and speak English
Barnum, Clyde; Son; W; M; b. Dec 1890; 9; Single; b. Texas; Father b. Missouri; Mother b. Louisiana
Barnum, Myrtle; Daughter; W; F; b. Dec 1891; 8; Single; b. Texas; Father b. Missouri; Mother b. Louisiana
Barnum, Henry; Son; W; M; b. Nov 1893; 6; Single; b. Texas; Father b. Missouri; Mother b. Louisiana
Barnum, Jack; Son; W; M; b. Sept 1896; 3; Single; b. Texas; Father b. Missouri; Mother b. Louisiana
Barnum, D. Lilian; Daughter; W; F; b. Dec 1898; 1; Single; b. Texas; Father b. Missouri; Mother b. Louisiana
In the 1910 US Census for District 74, Dallas Ward 10, Dallas County, Texas the family of William A. H. Barnum was enumerated as follows:
Dwelling 80; Family 84 (492 Pennsylvania Avenue)
Barnum, Augusta [sic[; Head; M; W; 51; 1st marriage; Married 21 years; b. Arkansas; Father b. Arkansas; Mother b. Louisiana; Mother tongue English; Laborer; Odd jobs; Wage earner; Not at work last regular workday; Out of work 6 weeks during the census year; Can read and write; Owns non-farm home free of mortgage
Barnum, Louis A. [sic]; Wife; F; W; 41; 2nd marriage; Married 21 years; Mother of 11 children; 8 children living; b. Arkansas; Father b. Mississippi; Mother b. Arkansas; Mother tongue English; No occupation; Can read and write
Barnum, Henry; Son; M; W; 16; Single; b. Texas; Both parents b. Arkansas; Mother tongue English; Laborer; Odd jobs; Wage earner; Not at work last regular workday; Out of work 6 weeks during the census year; Can read; Cannot write
Barnum, Jack; Son; M; W; 13; Single; b.Texas; Both parents b. Arkansas; Mother tongue English; No occupation; Can read and write; Attended school within the census year
Barnum, Dessie; Daughter; F; W; 11; Single; b.Texas; Both parents b. Arkansas; Mother tongue English; No occupation; Can read and write; Attended school within the census year
Barnum, Mosses [sic]; Daughter; F; W; 8; Single; b.Texas; Both parents b. Arkansas; No occupation; Attended school within the census year
Barnum, Doris; Daughter; F; W; 5; Single; b.Texas; Both parents b. Arkansas; No occupation
Barnum, Kate; Daughter; F; W; 1-10/12; Single; b.Texas; Both parents b. Arkansas; No occupation
[Note: this census enumeration contains obvious errors].