Okay, it turns out they weren't undiscovered letters; it's just that I had previously filed them by date-written, and I was looking at date-received when checking for duplicates.
I think this is primarily a reflection of how pathetically wishful I am when it comes to anything regarding Jenny. I so much *wanted* for there to have been more correspondence, even just a little more. A tiny note left somewhere (this has happened). Something newly understood. Anything. :-/
The social network of the future: No ads, no corporate surveillance, ethical design, and decentralization! Own your data with Mastodon!