I love this song.
One day at Berklee, many years ago, with one of my Brazilian students, I opened the Real Book to this tune to show him something about using major scales in improv, and his face lit up. He said, "Ah, Roberto Menescal! Yes, my mother lives near him in Brazil. He really does have a little boat, and he loves to go out in it on the river."
Whenever I play this tune, to try to keep a relaxed feel, I visualize Roberto floating down a river in Brazil.
Here's a sound clip of my arrangement of it. I recorded this with my little Zoom digital recorder on a gig at the Powow River Grille in Amesbury, MA, last year.
http://frogstoryrecords.com/mp3/my_l...w_20090412.mp3
Steve