She also arranged Sarasate 's Spanish dances for the piano .
At Brussels , he met Berthe Marx , who traveled with him as soloist and accompanist on his tours through Europe , Mexico , and the US ; playing in about 600 concerts .
Berthe Marx also arranged Sarasate 's Spanish dances for the piano .
At Brussels , he met Berthe Marx , who traveled with him as soloist and accompanist on his tours through Europe , Mexico , and the US ; playing in about 600 concerts .