Newell H. Barnum was born in Ohio. According to Census records, by 1900 he was living in California, where he remained.
1900 US Census for San Jose, Los Angeles County, California, ED 129 p. 6:
Barnham, Newell H.; b. Aug. 1851; Ohio; Penn; Penn; married 18 years
Barnham, Grace; b. Aug. 1860; Illinois; Mass; Mass; mother of 5 children, 3 living
Barnham, Oscar; b. May 1885; Iowa; Ohio; Ill
Barnham, Walter; b. May 1887; Iowa
Barnham, Grace E.; b. Aug 1896; Calif.
1910 US Census for Los Angeles, Los Angeles, California ED 79:
Barnum, Newell H.; 58; Ohio
Barnum, Grace; 49; mother of 5; 2 living
Barnum, Oscar N.; 25; Iowa
Barnum, Evelyn G.; 13; Calif
The same family group is in the 1920 Census in Los Angeles.