Before Cell Phones (or even telephones), Postcard/Greeting Cards were once the main way of letting distant friends and relatives know you were thinking about them. And some icons, we accept as tradition today, weren't always what we think they were.
For instance; ever hear of the Halloween Cabbages? Well in 1910, this card was sent to a friend or maybe a sweetheart. Kinda has a Valentine ring to it, doesn't it?
And we traditionally think of Jack-O-Lanterns as lighting the porch on Halloween for Trick or Treater's, but in 1908..........these children were hiding behind the pumpkin to watch the Turkey.