Cross-written letters - GIF

[mklotz]

More about it, with quotes from oe of my favorite books: Pride and Prejudice' by Jane Auten

https://www.heathermollauthor.com/po...rossed-letters
... the Penny Post introduction in 1840 helped.

The 1840 penny black is one of the holy grails of stamp collectors. However, even a messy, cancelled one will cost you $425 now.

https://www.mysticstamp.com/1-1840-g...n-penny-black/