Alma was listed with her family on the 11 Jun 1880 Census but was no longer listed in the revised 12 Nov 1880 Census. In 1900 Census, her mother reported bearing 5 children, only 4 of them still alive.
Alma was born about 1876. She was the daughter of Unknown Edgar. She passed away about 1880.
"United States Census, 1880," database with images, FamilySearch (https://familysearch.org/pal:/MM9.1.1/M6FR-TLH : 16 August 2017), Alma Edgar in household of Henry Edgar, St Louis, St Louis, Missouri, United States; citing enumeration district ED 149, sheet 367A, NARA microfilm publication T9 (Washington D.C.: National Archives and Records Administration, n.d.), roll 0724; FHL microfilm 1,254,724.