The question is what Ravn is. Compromised by Lindqvist, by the SVR, or by someone in Danish intelligence. All three are possible. All three lead to the same conclusion: you cannot use official channels.
You know two things that give you an edge. You know the name Lindqvist. And you know the archive at Rigsarkivet may hold the original document.
You take out your phone and call Anna Voss.
The story pauses here…