I so appreciate all your feedback, and I apologize for not watching the thread and responding sooner. The Arabic version that Joe Offer sent me could well be the root, but the actual melody that I recall is much more western sounding. To hear the song that evolved into my own repertoire, go to CDBaby.com and look for the album You Don't Know Jack. My song is called Come a Summer Night. The Tumba ta Tumba song that I learned around the campfire works as a third part. One of the first times I performed the piece on stage, Judy Cook was standing next to me (Havre de Grace Maritime Festival in Maryland). Astute listener that she is, with a keen ear and encyclopedic memory of songs old and new, she began singing the original behind me. Afterwards she told me she too had learned the song at Scout camp.