My 'letters' (taken literally) are printed on vellum, then scorched on the edges (as one often burns notes received). They are then attached to watercolour paper, complete with ink blots, with red sealing-wax stamped with the relevant letter.
Eventually I will turn them into a mini-book... perhaps titled 'A Book Of Letters' ?
So, on with the show... the photos are a little haphazard, not my strong point.
I'm rather hoping that these snippets of info will expand into a whole story in your imagination.