OBITUARY INFORMATION FROM FIND-A-GRAVE WEBSITE:

Stewart L Mattix
BIRTH          1914
DEATH          1988 (aged 73–74)
BURIAL         Ridgelawn Cemetery, Gary, Lake County, Indiana, USA  Show Map
MEMORIAL ID    162534164

This information and the picture below were obtained from: https://www.findagrave.com/memorial/162534164/stewart-l-mattix. The picture above was obtained from the 1931 HHS Aurora yearbook (when Stewart was a junior), made available by the Lake County Public Library, at: https://archive.org/details/HOHS1931Images/.