The Christ Child's Lullaby:
http://www.nigelgatherer.com/tunes/tab/tab1/ccl1.html

There are quite a few recordings of it. I am partly responsible for this contemporary arrangement of it being written:
http://www.sibeliusmusic.com/cgi-bin/show_score.pl?scoreid=27056

Alison MacMorland has recorded some good ones, a long time ago.