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From the birth certificate of George W. Weatherby's son, by the same name, born 1907, it shows his 28 year old father's occupation as Advertising. This is in Ward 7.
George Wallingford Weatherby birth date: 20 Mar 1907 birthplace: Chicago, Cook, Illinois gender: Male race: father's name: George Wallingford Weatherby father's birthplace: father's age: mother's name: Mary Agnes Culbert
Here's what was extracted from the 1910 Census
name: George W Weatherby birthplace: Illinois relationship to head of household: Son residence: Chicago Ward 7, Cook, Illinois marital status: Single race : White gender: Male immigration year: father's birthplace: Missouri mother's birthplace: Illinois family number: 95 page number: 5 Household Gender Age parent George W Weatherby M 30y parent Mary A Weatherby F 28y George W Weatherby M 3y George W Weatherby M 63y