My name is Sergio Moliner Clemente and I am The President of the Johann
Strauss Society of Spain.  Our web is

   http://www.teleline.es/personal/danubio/s1.htm

These are the answers.

John G. Deacon <[log in to unmask]> wrote:

>c) and d)  Which two composers, until 1843, provided rival dance bands
>    (sic) for the Imperial Court in Vienna?

Johann Strauss I and Joseph Lanner

>e) Which Strauss Waltz, originally to have been named 'Hand in Hand',
> was composed for the opening of Berlin's Konigsbau in 1889?

Kaiserwalzer opus 437 (Emperor's Waltz)

>f) What is the slowest variation of the waltz, first developed in the
>   1870s in the USA? It was often danced with the hands on
>     the partner's hips.

Boston's Waltz

Sergio Moliner
<[log in to unmask]>