Tronstad obliges by responding the same evening. (The year, given
here as 1943, is a transcriber's error.) Fearing the
worst—that even such uneven stocks of heavy water could help
the Nazis create an A-bomb—the Allied High Command decides
that the probable loss of Norwegian lives from the explosion
aboard the ferry and by drowning in the freezing water of Lake
Tinn, as well as through Nazi reprisals, is regrettable but
necessary.