“Private Mailing Cards” were invented in 1898. Since then, the design and technology behind postcards has changed several times, from the “divided back” to the “linen” and then photochrom. Postcards themselves depict scenes and document history.  Learn more about the history of postcards from expert Gregory Wilson, who has worked with postcards both in his antique business and as a Librarian, cataloguing Theodore Roosevelt’s postcard collection. Wilson is an expert appraiser of postcard and trade card collections. As part of his presentation he will evaluate antique postcards from the audience. You are invited to bring your old postcards.