That letter still hasn’t found what it’s looking for.
There is a history here of ridiculous things getting delivered so if that had made it to Ireland I’d say the postie would have done the business.
There was a lad a few years back that sent increasingly obscure addresses to see what would get delivered and documented it for fun. He called it “Me V’s An Post”.
One included a flippin’ jigsaw for the address (which was delivered). Here are some more details on his escapades.
Edit: Here’s the original blog. Looks like he was still playing games in 2020.
Here’s another one that did make it’s way to the intended recipient:
I was at a festival, a couple of years ago. Someone sent a letter, with a name, a tent colour, and a GPS location. Royal Mail (uk) delivered it the next day.
Impressive. That’s a good one.