James recently posted a postcard with criss cross
writing, it's the latest I have ever seen, but is odd
in that it's not stamped?
If the sender sent the card in a cover, you would think he/she
would have written inside that.
Anyhows, for the record, here is an example beautiful criss cross writing..
ack: A first guide to stamp collecting-Neill granger Oxford Uni Press 1994