Years later, did he go back and say, “I remember it as so much bigger. . . “?
The little boy was almost certainly the son of George Wesley Hess, who was Superintendent and then Director of the U.S. Botanic Garden from 1913 to 1934. There are more photos of the family and the Garden here.
I bless thee, Lord, because I GROW
Among thy trees, which in a ROW
To thee both fruit and order OW.
— George Herbert, from “Paradise”