Today, I heard on the radio about an exhibition on at the Tate: Salt prints, photographs taken between 1840-1860. This has me thinking about another photographic format - digital images. Will our descendants be able to open and see all these images in full glory in 170 years time? Possibly the majority of salt prints created in the 19th century may well have been lost, but those remaining are "visible" but maybe the software and technology for today's digital photos, stored on hard drives or other media, may not be available for future generations.
Thinking then of correspondence, will our descendants be visiting a museum containing emails written by famous people? Many museums have letters in already, but there may be a generation now unable to read them because they are unfamiliar with cursive handwriting. I love the flow of "handwriting" as opposed to block letters written in ballpoint, in fact, usually I find the former easier to read (although it may take me a while to get used to a particular writing style).