The MyHeritage Blog has an interesting article about preserving old letters:
“If you are fortunate enough to have a cache of old family letters, you are sitting on a gold mine. Letter writing has gone by the wayside since the invention of the telephone, e-mail, texting, Twitter, and Facebook, just to name a few ways of modern communication. Those old letters in your genealogy records collection should be preserved for future generations. Whether you have 100 letters or just one, they are important to your family history and add to your family story.