Send the following on WhatsApp
Continue to ChatUlmer Post Office (historical) Map - Sac County, IA https://www.yellowmaps.com/usgs/topo.cfm?map=ia-1982898-ulmer-post-office-%28historical%29
Ulmer Post Office (historical) Map - Sac County, IA https://www.yellowmaps.com/usgs/topo.cfm?map=ia-1982898-ulmer-post-office-%28historical%29