Well done again Balthazar, I think you deserve
at least one point!
I could have asked about a 'clearly delineated' audio-recorder, but I tried -most wrongly- to make it simpler, in order not to provoke more anti-intellectualism or so-called psychobabble hatred...
As you mentioned it, the 'Black Island' recorder is in a case -i.e. perfectly invisible but certainly one, as shown by the tiny wired microphone.
I was thus thinking mainly to the phonograph in
Tintin in the Congo (p.25-D2), employed by Tintin to record the baddies' talk.
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What can be said about those three books, in the light of Tintin's
unique world?
Those books with clearly delineated audio-recorders also hold
imaginary cameras, namely one without spools or reels (Congo), one with inappropriate spools (Emerald), and one that melts (Picaros).
Those cameras were discussed in June 2005 on
https://www.tintinologist.org/forums/index.php?phrase=camera+melt&searc hType=0&where=0&forum=&sDay=16&sMonth=2&sYear=2004&eDay=18&eMonth=11&e Year=2006&posterName=&action=search&searchGo=1
Maybe those three rather dissimilar books 'with audio-recorders & impossible cameras' do have some invisible connection with both
text &
image?