Hi Anon, if we're talking about the same song, I sang it at my school speech night almost exactly 31 years ago. The other song was 'The Road To Mandalay', which is somewhat more memorable. The chorus bits I recall:

Lindy, did you here that mocking bird sing last night,
Lindy, she was singing so sweet in the moonlight,
Neath the old magnolia tree,
Singin so sweet the melody

TGIF
John

PS I would love the words to Road to Mandalay. It's a great sing if you pretend to be a superb baritone like Peter Dawson (who I think made it best known - and an Aussie).