Glenn Gould: Beethoven Op.110 in Stockholm 1958 

Glenn Gould plays Beethoven: Sonata 31 in A-flat, Op.110.
The Musical Academy, Stockholm, October 5, 1958.
It is not clear from the notes to BIS CD 323/234, but it sounds to me that there was no audience present for the recordings of three sonatas: Berg Op.1, Haydn No.49, and this Beethoven sonata. (In the two concertos in this set, the audience is audible.) So I surmise that Gould agreed to record these for radio broadcast for the Swedish Broadcasting Association. If only Gould had always recorded for them! The piano is tuned and in good working order. The vocalisations are at a minimum (by Gould's standards (although, at 22:50 he is singing about an octave lower than usual)). Even the chair is behaving itself. If I'm right, we have something unusually interesting: beautifully recorded sonatas, played straight through with wonderful commitment. Listen, for instance, as he makes something special of the inner voices in Beethoven's fairly prosaic fugue. There is certainly no evidence in the music that Gould was having a rotten time in Stockholm.
But make what you will of these notes, by Gould, and transcribed in Otto Friedrich's biography at page 78": "George-Walter (?) Jochum's lebensraum lecture from Nietzche; 'the flu;' Bechstein-Steinway; the dinner party; Nordic hedonism; the letter 'flying under the flag;' 'Gt." Dictator Chaplin".
And from a letter to manager Walter Homburger On October 2: "I have fallen victim to another flu a la Salzburg (current temperature 101 degrees").
Sources:
audio: BIS CD 323/324
score: imslp.org Public Domain