where I can get the sheet music?
http://www.burkewhistles.com/product.php?productid=16141&cat=258&page=1
The link you give doesn’t actually have any music. I think his main homepage has a number of tunes.
I think you are referring to “The Cup of Tea / The Ivy Leaf” by The Kells which is the same one as plays on the Burke homepage. If so, they can be found here: http://www.thesession.org/tunes/display/20 and http://www.thesession.org/tunes/display/1112
Brian is an awsome whistler… and his flute playing is nothing to sneeze at either! Great stuff! I love Kim’s guitar playing too. They are quite a neat pair of folks. He taught whistle at St. Louis Tionól a couple of times in the last few years.