As far as I can tell there is only ONE winter friendly memorial marker on the entire cemetery grounds. Find this marker.
The cache can be found at: N 44° 45.ABC W 93° 07.DEF
ABC = Jane's death year MINUS 1516.
DEF = Newton's death year MINUS 1209.
You are seeking a camo-taped peanut butter jar.
The final geocache container is not located inside the cemetery grounds. Please be respectful while snooping around.
You can validate your puzzle solution with certitude.