Today, my dh is thinking that they might be in St. Mary's Cemetery which was an offshoot of Mt. Olivet or vice versa. St. Mary's is administered by Mt. Olivet so... In any case a bit more research and a day that cemetery staff are present makes this a future visit.
But here is my father a WWII veteran, a veteran whose records either went up in smoke in the fire or drowned in the flood at the Records Center in St. Louis. That center is doomed.
Many thanks to all our veterans wherever they may be.