I've edited the MIDI from the Classical Music Archives. I believe that it sounds enough like a folk song to merit inclusion here, especially since we have the lyrics.

It's a duet, and the melody is played by the oboe sound. The flute plays the alto.

Much of this piece sounds like a sweet, mournful Jewish folk song to me. Mendelssohn had a Jewish heritage, and I think it is reflected here.

I lowered the key so the highest note changed from an F to an E. It is in Em (belly-dance). Don't be scared by the Eb's. They are calling for a B chord. (I don't have time to change all the Eb's to D#'s.)

I've sent the MIDI to Joe for posting here. I hope that is all right.