One of the oldest pieces of mail I own is a postcard that was sent to my great-grandmother, Alma Olafson (below), before she married my great-grandfather, John Holen in 1912. This photo was taken in the 1950s. Alma was the recipient of the postcard below.
Etta G, the author of the postcard, I think may have been Alma's cousin, Emma Groettum, who went to teach at Pleasant Lake.
My grandmother, Alice (daughter-in-law to Alma) had this postcard in one of her photo albums that I inherited when she died years ago.