Paul MacKay responded to me:
>>3) The opening of Brahms' Second and the Eroica
>
>I don't get that one. Which movement of the Eroica? (Do you mean Brahms's
>second *Symphony*?)
It's the main theme of the first movement of the Eroica and the main theme
of the first movement of Brahms' second symphony. The pitches are different
but the rhythm is identical.
Peter