I've seen letters addressed to my grandfather which didn't have the street address or state included on the envelope -- just the name and town. Of course, when I was small, we were on a party-line for phone service, and to dial a local number, you only needed to dial the last four digits.
Same here...and we could usually tell which neighbor was listening in by they're breathing patterns! "Big Brother" ??? Nope!!! It's Nosy Neighbor Norma!!

