Like, you aren’t necessarily next door neighbors. You’d have to take the streetcar or bus or commuter rail some distance to go meet your friend. You can’t text “sorry the train is 30 minutes late”, because no cell phones, no internet, no tracking buses or trains on your smartphone. No payphones or landlines.
Letters are only for those cross-continental, cross-oceanic relationships. If you live in the same city, then well you’d still have to meet in person cuz it’s not the digital age, no doomscrolling social media and sending texts and memes.
I feel like those were the days where you could have true friendships in society, not “having friends to send memes”.
Before landlines, you’d write them a letter to arrange a meeting.
The mail was delivered up to 4 times a day depending on where you lived.
And since only one family member (generally the father) had to work to support the family, there was almost always someone home.
So another option would be to simply visit them unannounced at a time you knew they’d be there.
In many regions, it would have been normal to simply walk in to a friend’s house, even without knocking.
Also, you’d know this person from somewhere. Somewhere you met.
Either at work, or at a club, or a union meeting, or a pub. You get the idea.
So you’d see them regularly in person, cause otherwise you wouldn’t get to know them in the first place.
Also, you’ve probably heard of a “calling card,” but these were actual physical things. If you dropped by someone’s home or business when they weren’t there, you could leave behind a card saying you were there and wanted to get in touch.