Read about this series of posts, regarding items in a box originally owned by Belle (Lamunion) Fellows Tinker here.
The cast of characters is located here.
This card wasn’t mailed. the front reads:
A Happy Birthday to you
The back says, To Mrs Fellows, from Mary Whitney.
I am unable to find any Whitney family with a female named “Mary” in Colfax or Greenwood townships, Michigan. The only Mary Whitney I can find in in Newaygo County, seemed to reside from 1880 to at least 1930 in Big Prairie Township. That Mary might be the writer of the card, but there is no way to be sure.