Tristorosa, for piano
Here's the first page of the score, published by Max Eschig:
Though the Eschig score shows that the work is by Heitor Villa-Lobos, the piece was originally published under the pseudonym Epaminondas Villalba Filho, a pseudonym originally used by Heitor's father Raúl.
Solo piano
Max Eschig, Paris
Première performance: 20.11.1968, Rio de Janeiro / Festival Villa-Lobos, Sal Cecilia Meireles, Arnaldo Estrella, piano