Paul Silverthorne wrote:

>There is a sighting closer to hand.  If you have the score of the Jupiter,
>turn back a page from the Finale and look at the Flute & violin parts at
>the double bar of the Trio.

I think you're referring to the part that sounds very much like the opening
to Beethoven's op. 132 String Quartet (and it's even in the same key).

Mike