Kindle. Standard Ebook edition. Perhas the third time around with this classic. The ambiguities, inspecifities and vagueness bothered me less though I still got stuck on such basics as whether Marlow was specifically commissioned to remove Kurtz — we're not exactly told but that's all he does. I was a bit more prepared to accept Conrad's game of personifying extractive European colonisation in the Congo and therefore was less put out by all the claims made about Kurtz that are not substantiated, such as his oratory powers.
There's also the question of locations and routes. Obviously we start on the Thames and Marlow proceeded down the west coast of Africa, past the erstwhile French colonies, and up the Congo River to the Belgian outposts that were accumulating ivory. I expect the sepulchral city was and is Brussels. I was at a loss as to where his boat left from, it being French: Brussels, or perhaps Marseilles? It struck me that the company he worked for was overly dependent on other organisations and people for getting dirty work done.
The Orson Welles broadcast from 1938 is available at the Internet Archive. I'd forgotten that Patchett's State of Wonder is a reimagining.