Florence Irene Ford died in 1871 at age ten, and was buried in Natchez City Cemetery in Mississippi.
During her short life she was extremely frightened of storms and whenever one occurred she would rush to her mother to find comfort.The glass window was walled off in the 1950s to prevent vandalism, but the metal doors still work. More photos here, here, and here.
Upon her death her mother was so struck with grief that she had Florence's casket constructed with a glass window at the child's head. The grave was dug to provide an area, the same depth of the coffin, at the child's head, but this area had steps that would allow the mother to descend to her daughter's level so she could comfort Florence during storms. To shelter the mother during storms, hinged metal trap doors were installed over the area the mother would occupy while at her child's grave.