The 1900 census for the family shows a Harry Stewart, born Feb. 1891, but no Charles Stewart Jr. The 1910 census shows a Charles H. Stewart, agr 18. The findagrave for Charles H. Stewart shows a birthdate of Feb. 12, 1892. I cannot find anything else documenting a Harry Stewart that fits the person shown in the 1900 census, so conclude that this "Harry Stewart" and "Charles H. Stewart" are most likely the same person.