There are times that try our souls, usually consistent with when legislatures are in session. I must either bang my head against the wall or write letters.

So far, my best idea for tracking correspondence is to enter letters as Aeon Timeline mindmap nodes. That lets me create a tree of responses. I can flip to timeline view to see how various dialogs relate in time and keep individual mindmaps for conversations.

X-link URLs in Aeon back to Devonthink relate the Aeon events to the documents. Sender and Recipient relationships in Aeon help, too.

Plugins for Obsidian will create timelines, but Obsidian hasn't struck my fancy yet.

Anybody have a better way? The idea is to keep a repository of correspondence and view timelines and a tree view of what I've written.

I like the approach you're using with AEON Timeline. In the past I've used Tinderbox in a similar way, for mapping the relationships between events in multi-year correspondences, so I could have both a timeline view and more concrete map view.

I am not sure exactly how Aeon works, so can't say that what I'm thinking is better, but either Heptabase or Scrintal could show a trail of correspondence, with each tile (or card) holding one piece of the correspondence. You might need to use some sort of tagging system to track the "timeline." Heptabase also allows you to add labels to the visual links, which might prove beneficial.

Steve Z