Lyrics:

My heart knows a lovely song
It whistles it all day long
If you know the melody
Please whistle it back to me
The way the bird in the beechwood tree
Calls to it's mate so I'll call to thee
Oh when will you answer me?
My lips are parched and my throat is numb
Does some inability make you dumb?
If you can cannot whistle, hum
Giacomo is my nom de plume
I whistle and hum, but I hum to whom
To whom do I hum, to whom?