Some information on this death record - IL Death Certificates - might be a clue to where the twin is buried.
This child born in Wayne Co., IL and buried at Endfield, IL.
Name Henry Leo Wilson
Titles and Terms (Original)
Event Date 06 Jan 1918
Event PlaceMt Vernon, Jefferson, Illinois
Birth Year (Estimated)1917
Birth Date 10 Mar 1916
Birth Place Wayne Co., Illinois
Father's Name Lee Wilson
Father's Titles and Terms
Father's Birthplace Spencer Co., Indiana
Mother's Name Della Williams
Mother's Titles and Terms
Mother's Birthplace Posey Co., Indiana
Occupationnone at home
Spouse's Titles and Terms (Original)
Burial Date 07 Jan 1918
Burial Place Endfield County, Ill.