Certificate of Death.
Source: "Georgia Deaths, 1914-1927", database with images, FamilySearch (https://familysearch.org/ark:/61903/1:1:JD6T-88J : 23 February 2021), Wm. Greenslade in entry for Charles Greenslade, 1921.

Information on file at R.E. Elliot Funeral Home in Augusta, Georgia with regard to Charles Greenslade

Information on file at Magnolia Cemetery in Augusta, Georgia with regard to Charles Greenslade

"Death of Infant", Augusta Herald (Georgia), August 3, 1921
The article reads as follows:
     Announcement is made of the death of the infant son of Mr. and Mrs. William Greenslade, which occurred Wednesday at 5:30 A.M. at the residence, 1941 Walton Way. Deceased was 24 days old.
     Funeral services will be conducted at the residence Thursday at 10:00 A.M., Rev. S.L. McCarty officiating, and interment will follow at the City Cemetery.

Map of Magnolia Cemetery in Augusta, Georgia showing the approximate place where Charles Greenslade is buried in an unmarked grave