Edith Cook was born in 1873 She passed away in 1876. Her small glass, cast-iron casket was originally from the 1870's at San Francisco's Odd Fellows Cemetery.
Nearly 140 years later in May 2016, a construction crew at a home on Rossi Street near the University of San Francisco found the sealed casket.
Inside they found a little girl with long blonde hair, wearing a long white lace dress. She had a cross made of flowers on her chest and she was nicknamed Miranda Eve.  Through painstaking research and DNA, researchers have solved the mystery. She is Edith Cook, daughter of Horatio Nelson Cook and Edith Scooffy, and lived on 635 Sutter Street in San Francisco.
She died from Marasmus , a term used in the 1800s for extreme undernourishment likely brought on by any number of illnesses. 
Through the Garden of Innocence Project, the little girl was reburied in Colma, California. 
Note from Joseph Benton (10/26/2020): Verification of her death date can be verified by referencing page 114 of the Odd Fellows Cemetery Removal Registry PDF which can be found at https://oddfellowscemeterycolma.com/odd-fellows-cemetery-sf-registry/. This registry was microfilmed for the Genealogical Society of Salt Lake City, UT of documents filed with the San Francisco County Health Department of the disinterment and interment of graves and remains from the old Odd Fellows Cemetery in the city limits of San Francisco to San Mateo County (Colma Cemetery). There are over 20,000 names with dates of death recorded; the remains of all these Odd Fellows and their families were supposed to have been moved, however, with so many remains to move it is not a surprise that some may have been missed. The book does record her date of death as October 13, 1876 and she was buried in the original 1-2 section of the Yerba Buena area of the old Odd Fellows Cemetery.