1910 Census in San Francisco, California, there's a Bert Atkinson, who is a brother of Arthur Atkinson, who is married to an Annie. Does that look like it might be him?
1930 Census, San Francisco, California, 1909 Van Nest (?) Street
Egbert Atkinson, roomer, male, white, age 45, single, able to read and write, born England, parents born England, immigrated 1903, alien, occupation is hard to read, but looks like it starts with Art - maybe artist? It says he has his own business. He was not a veteran.
California Death Index
Egbert Archibald Atkinson
No Social Security number listed
Born 1 Mar 1881 in another country
Died 5 May 1947 in San Francisco
Mother's maiden name: McCarthy
Father's surname: Atkinson