Hola Lena,

it's a long time since I looked for the tune, but finally here are the good tidings:
The song is part of the Gerineldo cyclus. I have found a romance of 165 lines with 4 tunes. The source:
Larrea Palacín, Arcadio de:
Romances de Tetuán ; vol. 2. - Madrid : Instituto de Estudios Africanes, 1952
(Cancionero judío del norte de Marruecos ; 2)
Mes de Mayo: pg. 25 - 30

I'm a little bit ashamed, because I ordered a lot of Spanish songbooks and didn't find anything; when I found this cancionero on one of the shelves of the library I'm head of, it opened exactly with the page in question!

Since this book is not registered in the Library of Congress, you may send me your postal adress and get a xerox of pages 25-30 in return.

Wilfried