So into the mailbox it went.
I just learned of its reception, satisfying to the other party, which is the aim of a letter, isn't it? As with all things these days, a mention on a social website elicited comments such as "I remember letter in a mailbox, they still do that, huh?" and "saving the envelope and keeping the letter, we should all try it" and "Oh good June, they can put it right next to the dinosaur display (at the Smithsonian)... I can't wait to see."
I used to write lots of letters to lots of people all the time. Then came the 21st Century. I've decided that phenomenon isn't a good enough reason to stop writing letters.
But finding a stamp could prove problematic, given time.