Speaking from personal experience, I can tell you that it's much easier to provide a list of stories if one isn't trying to provide links for all of them.
This is the main reason my recommendations page hasn't been updated in mumblemumble years...
Anyway... Thanks for the recommendations, Maria!
Carol's right, though -- "Tryst" was not set in canon, although it did involve the Congo. I second the recommendation for Carol's "Connections" -- great story, on many levels.
Out of curiosity, I went to the archive and did a Google search of it, searching on "congo" and "clarks" (from the ep title; that seemed like it would narrow things down). The search pulled up 12 stories... maybe one of those is what you're looking for.
PJ